СПИСОК патентов США - подгруппа МПК16 H04R3/04
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№ п/п | Номер патента | Название патента | |||
2017 | |||||
1 | 9609450 | Method and system for monitoring speaker temperature for speaker protection | |||
2 | 9609436 | Systems and methods for audio creation and delivery | |||
3 | 9609433 | Automatic audio system equalizing | |||
4 | 9609432 | Microphone with automatic bias control | |||
5 | 9609418 | Signal processing circuit | |||
6 | 9607628 | Audio system | |||
7 | 9596542 | Apparatus and method with enhancement of sound quality | |||
8 | 9596537 | Systems and methods for reduction of audio artifacts in an audio system with dynamic range enhancement | |||
9 | 9591422 | Method and apparatus for audio interference estimation | |||
10 | 9591410 | Hearing assistance apparatus | |||
11 | 9590581 | System and method for reduction of signal distortion | |||
12 | 9584940 | Wireless exchange of data between devices in live events | |||
13 | 9584911 | Multichip dynamic range enhancement (DRE) audio processing methods and apparatuses | |||
14 | 9584899 | Sharing of custom audio processing parameters | |||
15 | 9583112 | Signal processing apparatus and signal processing method, encoder and encoding method, decoder and decoding method, and program | |||
16 | 9577595 | Sound processing apparatus, sound processing method, and program | |||
17 | 9570058 | Audio signal processing device and parameter adjusting method | |||
18 | 9570057 | Audio signal processing methods and systems | |||
19 | 9565505 | Loudspeaker cone excursion estimation using reference signal | |||
20 | 9565497 | Enhancing audio using a mobile device | |||
21 | 9565496 | Sound reproduction device | |||
22 | 9560466 | Systems and methods for simulation of mixing in air of recorded sounds | |||
23 | 9560447 | Blind extraction of target signals | |||
24 | 9554226 | Headphone response measurement and equalization | |||
25 | 9553554 | Signal processing device | |||
26 | 9552826 | Frequency characteristic modification device | |||
27 | 9549258 | Audio output balancing | |||
28 | 9544707 | Audio output balancing | |||
29 | 9544702 | Dynamic characterization of a communication device | |||
30 | 9543917 | Software for manipulating equalization curves | |||
31 | 9538288 | Sound field correction apparatus, control method thereof, and computer-readable storage medium | |||
2016 | |||||
32 | 9532143 | Low frequency equalization for loudspeaker system | |||
33 | 9525942 | Mobile apparatus and control method thereof | |||
34 | 9524731 | Active acoustic filter with location-based filter characteristics | |||
35 | 9524098 | Methods and systems for subwoofer calibration | |||
36 | 9521497 | Systems and methods for equalizing audio for playback on an electronic device | |||
37 | 9521488 | Playback device setting based on distortion | |||
38 | 9521487 | Calibration adjustment based on barrier | |||
39 | 9517366 | Respirator mask speech enhancement apparatus and method | |||
40 | 9516444 | Wireless control and calibration of audio system | |||
41 | 9516419 | Playback device setting according to threshold(s) | |||
42 | 9516415 | Double backplate MEMS microphone with a single-ended amplifier input port | |||
43 | 9516414 | Communication device and method for adapting to audio accessories | |||
44 | 9515630 | Musical dynamics alteration of sounds | |||
45 | 9515629 | Adaptive audio equalization for personal listening devices | |||
46 | 9510089 | Dynamic location determination for a directionally controllable parametric emitter | |||
47 | 9510068 | Automatic equalization of loudspeaker array | |||
48 | 9503832 | System and methods for motion restoration in acoustic processing of recorded sounds | |||
49 | 9491549 | Equalizer apparatus | |||
50 | 9491546 | Electronic device and audio-data transmission method | |||
51 | 9491545 | Methods and devices for reverberation suppression | |||
52 | 9486823 | Off-ear detector for personal listening device with active noise control | |||
53 | 9485578 | Audio format | |||
54 | 9467779 | Microphone partial occlusion detector | |||
55 | 9466309 | Method and device for processing audio signal | |||
56 | 9462382 | Audio system | |||
57 | 9460727 | Audio encoder for wind and microphone noise reduction in a microphone array system | |||
58 | 9456277 | Systems, methods, and apparatus to filter audio | |||
59 | 9456268 | Method and device for background mitigation | |||
60 | 9449082 | Systems and methods for dynamic audio processing | |||
61 | 9443506 | High frequency energy converter | |||
62 | 9443503 | Signal processing device, signal processing method and signal processing program | |||
63 | 9443502 | Method for reducing parasitic vibrations of a loudspeaker environment and associated processing device | |||
64 | 9439022 | Playback device speaker configuration based on proximity detection | |||
65 | 9439021 | Proximity detection using audio pulse | |||
66 | 9438996 | Systems and methods for calibrating speakers | |||
67 | 9438995 | Audio signal processing circuit | |||
68 | 9438994 | Instrument amplification systems incorporating reflection cancelling boundary microphones and multiband compression | |||
69 | 9437210 | Audio signal processing | |||
70 | 9432792 | System and methods for acoustic priming of recorded sounds | |||
71 | 9432761 | Signal processor | |||
72 | 9426600 | Audio precompensation controller design with pairwise loudspeaker channel similarity | |||
73 | 9426570 | Audio processing device and method | |||
74 | 9426569 | Audio signal bandwidth to codec bandwidth analysis and response | |||
75 | 9420373 | Display apparatus, hearing level control apparatus, and method for correcting sound | |||
76 | 9420367 | Passive acoustical filters with filled expansion chamber | |||
77 | 9419575 | Audio settings based on environment | |||
78 | 9414164 | Audio signal correction and calibration for a room environment | |||
79 | 9414163 | Amplifier capable of controlling cut-off frequency in real time and amplification method for controlling cut-off frequency in real time | |||
80 | 9414156 | Reducing resonance | |||
81 | 9414151 | Speaker system | |||
82 | 9413316 | Asymmetric polynomial psychoacoustic bass enhancement | |||
83 | 9412356 | Apparatus and method for non-occluded active noise shaping | |||
84 | 9412129 | Equalization using user input | |||
85 | 9407993 | Latency reduction in transposer-based virtual bass systems | |||
86 | 9407991 | Systems and methods for using a speaker as a microphone in a mobile device | |||
87 | 9407224 | Digital microphone device with extended dynamic range | |||
88 | 9398387 | Sound processing device, sound processing method, and program | |||
89 | 9397629 | System and method for digital signal processing | |||
90 | 9392366 | Magnitude and phase correction of a hearing device | |||
91 | 9386387 | Audio measurement amplifier | |||
92 | 9386374 | Apparatus and method for keeping output loudness and quality of sound among different equalizer modes | |||
93 | 9380386 | Distortion sound correction complement device and distortion sound correction complement method | |||
94 | 9380385 | Compressor based dynamic bass enhancement with EQ | |||
95 | 9380384 | Systems and methods for providing a wideband frequency response | |||
96 | 9380383 | Modifying playback of content using pre-processed profile information | |||
97 | 9374128 | Apparatus for encoding/decoding multichannel signal and method thereof | |||
98 | 9374057 | Electronic device and method for controlling electronic device | |||
99 | 9369104 | Audio output balancing | |||
100 | 9363601 | Audio output balancing | |||
101 | 9357302 | System and method for extracting parameters of a speaker without using stimulus | |||
102 | 9349363 | Audio signal processing system and echo signal removing method thereof | |||
103 | 9344829 | Indication of barrier detection | |||
104 | 9344821 | Dynamically providing to a person feedback pertaining to utterances spoken or sung by the person | |||
105 | 9344051 | Apparatus, method and storage medium for performing adaptive audio equalization | |||
106 | 9338553 | Spectral shaping for audio mixing | |||
107 | 9338552 | Coinciding low and high frequency localization panning | |||
108 | 9338387 | Integrated audio video signal processing system using centralized processing of signals | |||
109 | 9332370 | Method and apparatus for using spatial audio rendering for a parallel playback of call audio and multimedia content | |||
110 | 9331656 | Audio systems and methods employing an array of transducers optimized for particular sound frequencies | |||
111 | 9326379 | Magnetically enhanced electrical signal conduction apparatus and methods | |||
112 | 9326087 | Sound augmentation system performance health monitoring | |||
113 | 9326067 | Multiplexing audio system and method | |||
114 | 9325285 | Method of reducing un-correlated noise in an audio processing device | |||
115 | 9319791 | Reduced-delay subband signal processing system and method | |||
116 | 9319790 | Systems and methods of frequency response correction for consumer electronic devices | |||
117 | 9319789 | Bass enhancement | |||
118 | 9319770 | Audio devices configured to emit differing sound profiles and related methods | |||
119 | 9307323 | System and method for bass enhancement | |||
120 | 9307322 | Systems and methods of frequency response correction for consumer electronic devices | |||
121 | 9307321 | Speaker distortion reduction | |||
122 | 9305568 | Active acoustic filter with socially determined location-based filter characteristics | |||
123 | 9301071 | Reducing audio distortion in an audio system | |||
124 | 9301048 | Signal processing method, signal processing device, and signal processing program | |||
125 | 9300266 | Speaker equalization for mobile devices | |||
126 | 9288579 | Method for dynamically adjusting gain of parametric equalizer according to input signal, dynamic parametric equalizer and dynamic parametric equalizer system employing the same | |||
127 | 9286863 | Apparatus and method for a celeste in an electronically-orbited speaker | |||
128 | 9282413 | Apparatus and method for automatic audio system and recovery from unexpected behaviors | |||
129 | 9282406 | Digital microphone with frequency booster | |||
130 | 9280986 | Acoustic signal processing device and acoustic signal processing method | |||
131 | 9277318 | Signal processing apparatus, signal processing method, and program | |||
132 | 9271078 | Audio output device capable of switching a sound field | |||
133 | 9264839 | Playback device configuration based on proximity detection | |||
134 | 9264829 | Device and method for detecting force factor of loudspeaker | |||
135 | 9264823 | Audio headset with automatic equalization | |||
136 | 9264811 | EQ correction for source device impedance and output device impedance interactions | |||
137 | 9264810 | Directed audio | |||
138 | 9264800 | Audio signal processing apparatus and audio signal processing method | |||
139 | 9264158 | Audio signal processing apparatus | |||
140 | 9263062 | Vibration sensor and acoustic voice activity detection systems (VADS) for use with electronic systems | |||
141 | 9247342 | Loudspeaker enclosure system with signal processor for enhanced perception of low frequency output | |||
142 | 9241215 | Mobile apparatus and control method thereof | |||
143 | 9237392 | Earhole-wearable sound collection device, signal processing device, and sound collection method | |||
144 | 9237391 | Low noise differential microphone arrays | |||
145 | 9236842 | Bass enhancement system | |||
146 | 9232311 | Method for processing an audio signal with modeling of the overall response of the electrodynamic loudspeaker | |||
2015 | |||||
147 | 9226087 | Audio output balancing during synchronized playback | |||
148 | 9226073 | Audio output balancing during synchronized playback | |||
149 | 9215532 | Systems and methods for using a speaker as a microphone in a mobile device | |||
150 | 9214916 | Acoustic processing device | |||
151 | 9210507 | Microphone hiss mitigation | |||
152 | 9210506 | FFT bin based signal limiting | |||
153 | 9204218 | Microphone sensitivity difference correction device, method, and noise suppression device | |||
154 | 9204217 | Microphone filter system | |||
155 | 9197960 | Phase correcting canalphone system and method | |||
156 | 9191749 | Electronic device that vibrates an element for sound transmission | |||
157 | 9191743 | Apparatus using missing fundamental frequencies to improve loudspeaker sound focusing | |||
158 | 9191742 | Enhancing audio at a network-accessible computing platform | |||
159 | 9185485 | Methods and apparatus for processing audio signals | |||
160 | 9167345 | Method and device of channel equalization and beam controlling for a digital speaker array system | |||
161 | 9167344 | Spectrally uncolored optimal crosstalk cancellation for audio through loudspeakers | |||
162 | 9165546 | Recording and playback device capable of repeated playback, computer-readable storage medium, and recording and playback method | |||
163 | 9164724 | Audio adjustment system | |||
164 | 9161128 | Adjustable canalphone system | |||
165 | 9159337 | Apparatus and method for generating a high frequency audio signal using adaptive oversampling | |||
166 | 9154894 | Frequency characteristics determination device | |||
167 | 9154875 | Device for and method of processing an audio data stream | |||
168 | 9154096 | Apparatus and method for controlling sound output | |||
169 | 9148725 | Methods and apparatus for improving audio quality using an acoustic leak compensation system in a mobile device | |||
170 | 9148164 | Multi-path analog front end and analog-to-digital converter for a signal processing system | |||
171 | 9136962 | Frequency characteristics control device | |||
172 | 9131308 | Passive audio ear filters with multiple filter elements | |||
173 | 9131296 | Auto-configuring audio output for audio performance and fault detection | |||
174 | 9124982 | Always on headwear recording system | |||
175 | 9118997 | Speaker device and filter coefficient generating device therefor | |||
176 | 9118992 | Ported enclosure and automated equalization of frequency response in a micro-speaker audio system | |||
177 | 9113262 | Methods and apparatus for transmitting vibrations | |||
178 | 9112591 | Apparatus for encoding/decoding multichannel signal and method thereof | |||
179 | 9106993 | Sound processing apparatus | |||
180 | 9100759 | Loudspeaker driver with sensing coils for sensing the position and velocity of a voice-coil | |||
181 | 9099075 | Standing wave attenuation device | |||
182 | 9085273 | Method for signal processing of solid-borne sound signals, in particular in motor vehicles, and an occupant protection system with corresponding signal processing unit | |||
183 | 9084050 | Systems and methods for remapping an audio range to a human perceivable range | |||
184 | 9084049 | Automatic equalization using adaptive frequency-domain filtering and dynamic fast convolution | |||
185 | 9084048 | Audio systems and methods employing an array of transducers optimized for particular sound frequencies | |||
186 | 9078062 | Driving of parametric loudspeakers | |||
187 | 9071268 | Multi-path analog front end and analog-to-digital converter for a signal processing system | |||
188 | 9071267 | Multi-path analog front end and analog-to-digital converter for a signal processing system | |||
189 | 9071215 | Audio signal processing device, method, program, and recording medium for processing audio signal to be reproduced by plurality of speakers | |||
190 | 9066186 | Light-based detection for acoustic applications | |||
191 | 9066177 | Method and arrangement for processing of audio signals | |||
192 | 9065411 | Adaptive sound field control | |||
193 | 9060223 | Method and circuitry for processing audio signals | |||
194 | 9060222 | Method for determining an averaged frequency-dependent transmission function for a disturbed linear time-invariant system, evaluation device and computer program product | |||
195 | 9055362 | Methods, apparatus and systems for individualizing audio, music and speech adaptively, intelligently and interactively | |||
2014 | |||||
196 | 8917884 | Device for processing sound signal, and method of processing sound signal | |||
197 | 8842845 | Adaptive bass management | |||
198 | 8675130 | Electronic adapter unit for selectively modifying audio or video data for use with an output device | |||
2013 | |||||
199 | 8526647 | Listening device providing enhanced localization cues, its use and a method | |||
200 | 8494171 | Energy saving PWM sound device | |||
201 | 8484021 | Apparatus for encoding/decoding multichannel signal and method thereof | |||
2011 | |||||
202 | 7995774 | Sound field control apparatus and sound field control method | |||
2005 | |||||
203 | 6965676 | Volume-responsive loudness compensation circuits, systems, and methods | |||
204 | 6904154 | Acoustic device | |||
205 | 6876749 | Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics | |||
206 | 6859538 | Plug and play compatible speakers | |||
2004 | |||||
207 | 6792115 | Apparatus for generating harmonics in an audio signal | |||
208 | 6775385 | Loudspeaker frequency distribution and adjusting circuit | |||
209 | 6771784 | Sub woofer system | |||
210 | 6760451 | Compensating filters | |||
211 | 6751333 | Inertial vibration transducers | |||
212 | 6731760 | Adjusting a loudspeaker to its acoustic environment: the ABC system | |||
213 | 6721428 | Automatic loudspeaker equalizer | |||
2003 | |||||
214 | 6665408 | Dynamic bass control circuit with variable cut-off frequency | |||
215 | 6654468 | Apparatus and method for matching the response of microphones in magnitude and phase | |||
216 | 6639994 | Loudspeaker having adjustable motor strength | |||
217 | 6639987 | Communication device with active equalization and method therefor | |||
218 | 6634455 | Thin-wall multi-concentric sleeve speaker | |||
219 | 6580799 | Keyboard comprising a loudspeaker | |||
220 | 6526149 | System and method for reducing non linear electrical distortion in an electroacoustic device | |||
221 | 6522758 | Compensation system for planar loudspeakers | |||
222 | 6519349 | Loudspeaker | |||
2002 | |||||
223 | 6408079 | Distortion removal apparatus, method for determining coefficient for the same, and processing speaker system, multi-processor, and amplifier including the same | |||
224 | 6404894 | Packaging | |||
225 | 6399870 | Musical instruments incorporating loudspeakers | |||
226 | 6385322 | Method and device for operation of a public address (acoustic irradiation) system | |||
227 | 6359991 | Greetings or the like card | |||
228 | 6351542 | Loudspeakers with panel-form acoustic radiating elements | |||
2001 | |||||
229 | 6327369 | Loudspeakers comprising panel-form acoustic radiating elements | |||
230 | 6320967 | Passenger vehicles incorporating loudspeakers comprising panel-form acoustic radiating elements | |||
231 | 6307942 | Panel-form microphones | |||
232 | 6304661 | Loudspeakers comprising panel-form acoustic radiating elements | |||
233 | 6285770 | Noticeboards incorporating loudspeakers | |||
234 | 6266426 | Visual display means incorporating loudspeakers | |||
235 | 6259935 | Electro-mechanical-acoustic transducing device | |||
236 | 6215881 | Ceiling tile loudspeaker | |||
237 | 6201878 | Portable compact disc player | |||
238 | 6198831 | Panel-form loudspeakers | |||
239 | 6192136 | Inertial vibration transducers | |||
240 | 6188775 | Panel-form loudspeakers | |||
241 | 6181799 | Greetings or the like card | |||
2000 | |||||
242 | 6151402 | Vibration transducers | |||
243 | 6134330 | Ultra bass | |||
244 | 6058194 | Sound-capture and listening system for head equipment in noisy environment | |||
1999 | |||||
245 | 6003766 | Vending machine | |||
246 | 5953431 | Acoustic replay device | |||
247 | 5923766 | Low frequency audio conversion circuit | |||
248 | 5920633 | Thin-wall multi-concentric cylinder speaker enclosure with audio amplifier tunable to listening room | |||
249 | 5892833 | Gain and equalization system and method | |||
250 | 5869892 | Noise eliminating element and electrical circuit having the same | |||
1998 | |||||
251 | 5835607 | Mobile radiotelephone with handsfree device | |||
252 | 5815585 | Adaptive arrangement for correcting the transfer characteristic of an electrodynamic transducer without additional sensor | |||
253 | 5805716 | Sound system gain and equalization circuit | |||
254 | 5805715 | Method and apparatus for compensating multi-resolution linear distortion | |||
255 | 5748754 | Sound system gain and equalization circuit | |||
256 | 5745585 | Dynamic equalization method and device | |||
257 | 5717773 | Sound system gain and equalization circuit | |||
1997 | |||||
258 | 5694476 | Adaptive filter for correcting the transfer characteristic of electroacoustic transducer | |||
259 | 5692051 | Electronic equalization for recessed loudspeaker mounting | |||
260 | 5668885 | Low frequency audio conversion circuit | |||
261 | 5627899 | Compensating filters | |||
1996 | |||||
262 | 5586191 | Adjustable filter for differential microphones | |||
263 | 5577126 | Overload protection circuit for transducers | |||
264 | 5515432 | Method and apparatus for volume and intelligibility control for a loudspeaker | |||
265 | 5511129 | Compensating filters | |||
266 | 5491452 | Peltier element as series noise clamp | |||
267 | 5481617 | Loudspeaker arrangement with frequency dependent amplitude regulation | |||
1995 | |||||
268 | 5475759 | Electronic filters, hearing aids and methods | |||
269 | 5467400 | Solid state audio amplifier emulating a tube audio amplifier | |||
270 | 5467393 | Method and apparatus for volume and intelligibility control for a loudspeaker | |||
271 | 5438625 | Arrangement to correct the linear and nonlinear transfer behavior or electro-acoustical transducers | |||
272 | 5412733 | Acoustic reproducing apparatus | |||
273 | 5406633 | Hearing aid with permanently adjusted frequency response | |||
274 | 5384856 | Acoustic system | |||
1994 | |||||
275 | 5377274 | Correction circuit and method for improving the transient behavior of a two-way loudspeaker system | |||
276 | 5369710 | Sound field correcting apparatus and method | |||
277 | 5357251 | Electronic filters, signal conversion apparatus, hearing aids and methods | |||
278 | 5303307 | Adjustable filter for differential microphones | |||
279 | 5297212 | Loudspeaker system installed on an automobile door and including a woofer and a tweeter | |||
1993 | |||||
280 | 5226089 | Circuit and method for compensating low frequency band for use in a speaker | |||
281 | 5225836 | Electronic filters, repeated signal charge conversion apparatus, hearing aids and methods | |||
282 | 5187692 | Acoustic transfer function simulating method and simulator using the same | |||
283 | 5185805 | Tuned deconvolution digital filter for elimination of loudspeaker output blurring | |||
284 | 5185801 | Correction circuit and method for improving the transient behavior of a two-way loudspeaker system | |||
285 | 5184331 | Transducer circuit for removing reactive component of transducer signal | |||
286 | 5181251 | Amplifier unit | |||
1992 | |||||
287 | 5173943 | Compact subwoofer with exceptional low frequency response | |||
288 | 5173575 | Acoustic apparatus | |||
289 | 5172417 | Apparatus for controlling acoustical transfer characteristics | |||
290 | 5170435 | Waveguide electroacoustical transducing | |||
291 | 5129005 | Electrodynamic loudspeaker | |||
292 | 5111419 | Electronic filters, signal conversion apparatus, hearing aids and methods | |||
293 | 5103190 | Driving apparatus, and control information storage body and protection circuit therefor | |||
1991 | |||||
294 | 5068903 | Method of and arrangement for linearizing the frequency response of a loudspeaker system | |||
295 | 5023914 | Acoustical frequency response improving with non-minimum phase circuitry | |||
296 | 5020109 | Apparatus for modulation of the timbre of an electrical amplifier, in particular for guitars | |||
297 | 5016280 | Electronic filters, hearing aids and methods | |||
298 | 5014320 | Driving apparatus, and control information storage body and protection circuit therefor | |||
299 | 5009280 | Acoustic apparatus | |||
300 | 4997057 | Method and apparatus of expanding acoustic reproduction range | |||
301 | 4995113 | Device for processing an audio-frequency electrical signal | |||
302 | 4991221 | Active speaker system and components therefor | |||
1990 | |||||
303 | 4980914 | Sound field correction system | |||
304 | 4972489 | Sound reproducing apparatus | |||
305 | 4943956 | Driving apparatus | |||
306 | 4937874 | Emulated guitar loudspeaker | |||
307 | 4934770 | Electronic compression system | |||
308 | 4926139 | Electronic frequency filter | |||
309 | 4922131 | Differential voltage threshold detector | |||
310 | 4912393 | Voltage regulator with variable reference outputs for a hearing aid | |||
1989 | |||||
311 | 4888811 | Loudspeaker device | |||
312 | 4876499 | Differental voltage controlled exponential current source | |||
313 | 4870690 | Audio signal transmission system | |||
314 | 4868878 | Sound field correction system | |||
315 | 4843625 | Sound reproduction systems | |||
316 | 4829270 | Compansion system | |||
317 | 4817168 | Directional microphone | |||
318 | 4807217 | Multi-channel stereo reproducing apparatus | |||
319 | 4797933 | Bass amplifier with high frequency response | |||
1988 | |||||
320 | 4790018 | Frequency selection circuit for hearing aids | |||
321 | 4741040 | Bass-reflex loudspeaker system | |||
322 | 4739514 | Automatic dynamic equalizing | |||
323 | 4720665 | Signal transducer | |||
1987 | |||||
324 | 4709391 | Arrangement for converting an electric signal into an acoustic signal or vice versa and a non-linear network for use in the arrangement | |||
325 | 4683590 | Inverse control system | |||
326 | 4675835 | Device for compensating reproduction errors in an electroacoustic transducer | |||
327 | 4649565 | Electro-acoustic converter with compensated frequency response characteristic | |||
328 | 4644505 | Broadband matching network | |||
329 | 4638258 | Reference load amplifier correction system | |||
1986 | |||||
330 | 4631749 | ROM compensated microphone | |||
331 | 4628530 | Automatic equalizing system with DFT and FFT | |||
332 | 4628528 | Pressure wave transducing | |||
333 | 4625328 | Integrated amplifier and speaker system with improved cooling efficiency | |||
334 | 4622691 | Mobile sound field correcting device | |||
335 | 4606071 | Loudspeaker system utilizing an equalizer circuit | |||
336 | 4598178 | Means for critically damping a dynamic loudspeaker | |||
337 | 4569076 | Motion picture theater loudspeaker system | |||
338 | 4566120 | Loudspeaker system and loudspeaker for use in a loud-speaker system for converting an n-bit digitized electric signal into an acoustic signal | |||
1985 | |||||
339 | 4555797 | Hybrid loudspeaker system for converting digital signals to acoustic signals | |||
340 | 4547819 | Magnetic pickup preamplifier | |||
341 | 4528691 | Alternating variable delay control arrangement and method for push-pull audio transducers | |||
342 | 4509193 | Miniature acoustical transducer with filter/regulator power supply circuit | |||
343 | 4504704 | Loudspeaker system | |||
344 | 4503554 | Stereophonic balance control system | |||
345 | 4503553 | Loudspeaker system | |||
346 | 4501015 | Apparatus for electroacoustic energy conversion | |||
347 | 4496910 | Pre-amplifier having improved sonic performance | |||
1984 | |||||
348 | 4483015 | Compensation network for loudspeakers | |||
349 | 4482866 | Reference load amplifier correction system | |||
350 | 4481663 | Network for use with piezoceramic transducer | |||
351 | 4481662 | Method and apparatus for operating a loudspeaker below resonant frequency | |||
352 | 4476348 | Carbon microphone linearization technique | |||
353 | 4475233 | Resistively damped loudspeaker system | |||
354 | 4461931 | Frequency response equalizing network for an electrostatic loudspeaker | |||
355 | 4458362 | Automatic time domain equalization of audio signals | |||
356 | 4429181 | Audio system | |||
357 | 4426552 | Speaker distortion compensator | |||
1983 | |||||
358 | 4420655 | Circuit to compensate for deficit of output characteristics of a microphone by output characteristics of associated other microphones | |||
359 | 4406921 | Apparatus for improving linearity of electromechanical transducers | |||
360 | 4405832 | Circuit for distorting an audio signal | |||
361 | 4383134 | Loudspeaker systems | |||
362 | 4379951 | Electro-acoustic transducer means | |||
1982 | |||||
363 | 4361736 | Pressure recording process and device | |||
364 | 4361735 | Electret microphone circuit | |||
365 | 4340778 | Speaker distortion compensator | |||
366 | 4323736 | Step-up circuit for driving full-range-element electrostatic loudspeakers | |||
367 | 4316060 | Equalizing system | |||
368 | 4311872 | Portable voice communication system | |||
1981 | |||||
369 | 4306113 | Method and equalization of home audio systems | |||
370 | 4296444 | Inductive signal transducer supply circuit particularly for video recording use | |||
371 | 4295006 | Speaker system | |||
372 | 4291276 | Equalizer amplifier | |||
373 | 4260954 | Amplifier load correction system | |||
1980 | |||||
374 | 4223242 | Method and circuit for driving a piezoelectric transducer | |||
375 | 4198540 | Compensated crossover network | |||
1979 | |||||
376 | 4158787 | Electromechanical transducer-coupled mechanical structure with negative capacitance compensation circuit | |||
377 | 4154979 | Woofer efficiency | |||
378 | 4151379 | Electromagnetic speaker with bucking parallel high and low frequency coils drives sounding board and second diaphragm or external apparatus via magnetic coupling and having adjustable air gap and slot pole piece | |||
379 | 4145571 | Loudspeaker enclosure with acoustically coupled loudspeaker damper | |||
1978 | |||||
380 | 4130727 | Loudspeaker equalization | |||
381 | 4130726 | Loudspeaker system equalization | |||
382 | 4119814 | Hearing aid with adjustable frequency response | |||
383 | 4118600 | Loudspeaker lower bass response using negative resistance and impedance loading | |||
384 | 4113983 | Input filtering apparatus for loudspeakers | |||
385 | 4110696 | Audio eccentric connector plug | |||
386 | 4109107 | Method and apparatus for frequency compensation of electro-acoustical transducer and its environment | |||
387 | 4105945 | Active load circuits | |||
388 | 4101840 | Volume control arrangement for an electro-acoustic system | |||
1977 | |||||
389 | 4052560 | Loudspeaker distortion reduction systems | |||
390 | 4045748 | Audio control system | |||
391 | 4041247 | Method and apparatus for operation of carbon microphones at low average current levels | |||
392 | 4025722 | Method and apparatus for recording | |||
393 | 4021614 | Woofer equalizer | |||
394 | 4013845 | Temperature compensating reproducing system | |||
395 | 4002859 | Multi-mode electrostatic microphone construction | |||
1976 | |||||
396 | 3988541 | Method and apparatus for frequency compensation of electro-mechanical transducer | |||
397 | 3987245 | Compensated speaker-microphone | |||
398 | 3984704 | Device for correcting the frequency response of an electromechanical transducer | |||
399 | 3961202 | Power supply circuit for use with an electrostatic transducer | |||
400 | 3956716 | Pulse width modulated signal amplifier | |||
401 | 3944756 | Electret microphone | |||
402 | 3940709 | Equalization circuit | |||
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 |