IP Library › Granted Patent US 12,342,137
Granted Patent B2
US 12,342,137 · App. 17/739,926 · Granted Jun 24, 2025

System and method utilizing discrete microphones and virtual microphones to simultaneously provide in-room amplification and remote communication during a collaboration session

Inventors: David Gregory Popovich (Ottawa, CA); Mahdi Javer (Calgary, CA); David Gordon Johnson (Calgary, CA)
Assignee: NUREVA INC.
H04R3/005G10K11/17823G10K11/17873H04R1/025H04R1/04H04R1/403H04R1/406H04R3/12G10K2210/3027G10K2210/505H04R27/00H04R2227/009H04R2420/07H04R2430/01
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Quick Facts
Patent No.
US 12,342,137
App. No.
17/739,926
Granted
Jun 24, 2025
Kind
B2
Abstract

An integrated audio microphone system simultaneously provides in-room amplification and remote communication during a collaboration session with one or more local participants in a shared space and one or more remote participants. The integrated audio microphone system includes at least one microphone array and speaker system located in the shared space, at least one microphone system for amplification located in the shared space, an audio processor connected to the microphone system and the microphone array and speaker system, and a computer connected to the audio processor. The audio processor is configured to generate a plurality of virtual microphone bubbles and to amplify received audio signals from the microphone system for in-room audio amplification. The amplified audio signals are output to speakers of the microphone array and speaker system. Audio signals from the microphone system and the arrays of microphones are output to the computer to send the audio signals to one or more remote participants.

Claims (51)

1. A system, comprising:

one or more microphone arrays configured for unified communications sessions (UCCs) audio pickup, each of the one or more microphone arrays located in a shared space shared by one or more local participants, comprising a plurality of microphones combined and arranged in a product enclosure, wherein the one or more microphone arrays are configured to provide a full shared 3D space coverage for audio pickup of static and transient local participants not using a discrete microphone system, by locating and focusing on active talking local participants, in real-time, to receive audio signals from the focused one or more local participants;

one or more discrete microphone systems configured to provide amplification for in room reinforcement and UCCs audio pickup, wherein each of the one or more discrete microphone systems is configured to receive voice audio from a single local participant, per microphone system, among the one or more local participants located in the shared space;

one or more speakers all of which output audio signals to all of the one or more local participants in the shared space;

an audio processor connected to the one or more discrete microphone systems configured to provide amplification for in room reinforcement and UCCs audio pickup, the one or more microphone arrays configured for UCCs audio pickup, and the one or more speakers; and

a computer connected to the audio processor, wherein the computer is configured to receive audio signals from the audio processor and to output the audio signals from the audio processor to the one or more remote participants over Internet through one or more UCCs, and is configured to receive remote audio signals over the Internet from the one or more remote participants through the one or more UCCs, and to output the remote audio signals to the audio processor;

wherein the audio processor is configured to concurrently:

receive the remote participant audio signals from the computer through the one or more UCCs;

receive audio signals from the one or more microphone arrays configured for UCCs audio pickup;

receive audio signals from any of the one or more discrete microphone systems configured to provide amplification for in room reinforcement and UCCs audio pickup; and

split each received discrete microphone system audio signal into two identical audio streams, a first split audio signal stream and a second split audio signal stream, wherein:

the first split audio signal stream is amplified and combined with the output of the remote participant audio signals, and the combined output is transmitted to all of the one or more speakers in the shared space thereby providing (i) in room amplification from the one or more discrete microphones systems configured to provide amplification for in room reinforcement and (i1) in room speaker output from the one or more remote participants audio signals; and

the second split audio signal stream is combined with the audio signals from the one or more microphone arrays configured for UCCs audio pickup and output to the computer as combined audio signals for sending to one or more remote participants over the Internet through the one or more UCCs.

2. The system of claim 1 wherein the one or more discrete microphone systems comprise at least one wireless microphone wirelessly connected to a wireless transceiver connected to the audio processor and/or at least one wired microphone connected to the audio processor.

3. The system of claim 1 wherein the audio processor is configured to use the one or more microphone arrays to generate a plurality of virtual microphone bubbles to fill the shared space with the virtual microphone bubbles to capture the audio from the one or more local participants.

4. The system of claim 1 wherein the audio processor is configured to perform echo cancellation on the signals from the one or more microphone arrays by using the combined output of the first split audio signal stream and the output of the remote participant audio signals as reference signals.

5. The system of claim 1 wherein the audio processer includes a gating function that determines that the first split audio signal stream meets one or more gating function parameters before the first split audio signal stream is amplified and combined with the output of the remote participant audio signals.

6. The system of claim 1 wherein the audio processer includes a gating function that determines that the second split audio signal stream meets one or more gating function parameters before the second split audio signal stream is combined with the audio signals from the one or more microphone arrays configured for UCCs audio pickup.

7. The system of claim 1 wherein the audio processor is configured to condition audio signals from all of the one or more discrete microphone systems based on an expected signal level.

8. The system of claim 7 wherein the conditioning applies a positive or negative gain to the audio signals from all of the one or more microphone systems.

9. The system of claim 1 wherein the product enclosure is configured to include the plurality of microphones and the one or more speakers.

10. The system of claim 1 wherein the audio processor is configured to create a beamformer with varying lobes.

11. A system, comprising:

an audio processor comprising at least two outputs including a first output and a second output, and at least three inputs including a first input, a second input and a third input;

one or more discrete microphone systems connected to the audio processor and configured to provide amplification for in room reinforcement and unified communications sessions (UCCs) audio pickup, wherein each of the one or more discrete microphone systems is configured to receive voice audio from a single local participant, per microphone system, among one or more local participants located in a shared space shared by the one or more local participants;

one or more microphone arrays connected to the audio processor and configured for the UCCs audio pickup, each of the one or more microphone arrays located in the shared space, comprising a plurality of microphones combined and arranged in a product enclosure, wherein the one or more microphone arrays are configured to provide a full shared 3D space coverage for audio pickup of static and transient local participants not using a discrete microphone system, by locating and focusing on active talking local participants, in real-time, to receive audio signals from the focused one or more local participants;

one or more speakers connected to the audio processor, wherein all of the one or more speaker output audio signals to all of the one or more local participants in the shared space; and

a computer connected to the audio processor, wherein the computer is configured to receive audio signals from the audio processor and to output the audio signals from the audio processor to one or more remote participants over Internet through one or more UCCs, and is configured to receive remote audio signals over the Internet from the one or more remote participants through the one or more UCCs, and to output the remote audio signals to the audio processor;

wherein the audio processor is configured to concurrently:

receive the remote participant audio signals, through the first input, from the computer through the one or more UCCs;

receive audio signals, through the second input, from the one or more microphone arrays configured for UCCs audio pickup;

receive audio signals, through the third input, from any of the one or more discrete microphone systems configured to provide amplification for in room reinforcement and UCCs audio pickup; and

split each received discrete microphone system audio signal into two identical audio streams, a first split audio signal stream and a second split audio signal stream, wherein:

the first split audio signal stream is amplified and combined with the output of the remote participant audio signals, and the combined output is transmitted, through the first output, to all of the one or more speakers in the shared space thereby providing (1) in room amplification from the one or more discrete microphones systems configured to provide amplification for in room reinforcement and (11) in room speaker output from the one or more remote participants audio signals; and

the second split audio signal stream is combined with the audio signals from the one or more microphone arrays configured for UCCs audio pickup and output, through the second output, to the computer as combined audio signals for sending to one or more remote participants over the Internet through the one or more UCCs.

12. The system of claim 11 wherein the one or more discrete microphone systems comprise at least one wireless microphone wirelessly connected to a wireless transceiver connected to the audio processor and/or at least one wired microphone connected to the audio processor.

13. The system of claim 11 wherein the audio processor is configured to use the one or more microphone arrays to generate a plurality of virtual microphone bubbles to fill the shared space with the virtual microphone bubbles to capture the audio from the one or more local participants.

14. A method, comprising:

receiving audio signals, via an audio processor, from one or more remote participants through a computer configured to receive the remote participant audio signals over Internet from the one or more remote participants through one or more unified communications sessions (UCCs);

receiving audio signals, via the audio processor, from one or more microphone arrays configured for UCCs audio pickup, wherein each of the one or more microphone arrays is located in a shared space shared by one or more local participants, and comprises a plurality of microphones combined and arranged in a product enclosure, wherein the one or more microphone arrays are configured to provide a full shared 3D space coverage for audio pickup of static and transient local participants not using a discrete microphone system, by locating and focusing on active talking local participants, in real-time, to receive audio signals from the focused one or more local participants;

receiving audio signals, via the audio processor, from any of one or more discrete microphone systems configured to provide amplification for in room reinforcement and UCCs audio pickup, wherein each of the one or more discrete microphone systems is configured to receive voice audio from a single local participant, per microphone system, among the one or more local participants located in the shared space;

splitting each received discrete microphone system audio signal into two identical audio streams, a first split audio signal stream and a second split audio signal stream;

amplifying the first split audio signal stream, and combining the first split audio signal stream with the received remote participant audio signals;

transmitting the combined first split audio signal stream with the received remote participant audio signals to all of one or more speakers in the shared space thereby providing (i) in room amplification from the one or more discrete microphones systems configured to provide amplification for in room reinforcement and (ii) in room speaker output from the one or more remote participants audio signals;

combining the second split audio signal stream with the audio signals from the one or more microphone arrays configured for UCCs audio pickup; and

outputting the combined second split audio signal stream with the audio signals from the one or more microphone arrays to the computer for sending, via the computer, to the one or more remote participants over the Internet through the one or more UCCs.

15. The method of claim 14 wherein the one or more discrete microphone systems comprise at least one wireless microphone wirelessly connected to a wireless transceiver connected to the audio processor and/or at least one wired microphone connected to the audio processor.

16. The method of claim 14 wherein the audio processor is configured to use the one or more microphone arrays to generate a plurality of virtual microphone bubbles to fill the shared space with the virtual microphone bubbles to capture the audio from the one or more local participants.

17. The method of claim 14 wherein the audio processor is configured to perform echo cancellation on the signals from the one or more microphone arrays by using the combined output of the first split audio signal stream and the output of the remote participant audio signals as reference signals.

18. The method of claim 14 wherein the audio processer includes a gating function that determines that the first split audio signal stream meets one or more gating function parameters before the first split audio signal stream is amplified and combined with the output of the remote participant audio signals.

19. The method of claim 14 wherein the audio processer includes a gating function that determines that the second split audio signal stream meets one or more gating function parameters before the second split audio signal stream is combined with the audio signals from the one or more microphone arrays configured for UCCs audio pickup.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 25, 2023
From: POPOVICH, DAVID GREGORY; JAVER, MAHDI; JOHNSON, DAVID GORDON
To: NUREVA INC.
Reel/Frame 063430/0422 →
Continuity (2)
Provisional Application 63186450 · May 10, 2021
Related Publication 20220360895A1 · Nov 10, 2022
References Cited (132)
US 4499578A · Marouf et al. · 1985 [cited by applicant]
US 4536887A · Kaneda et al. · 1985 [cited by applicant]
US 5477270A · Park · 1995 [cited by applicant]
US 5699437A · Finn · 1997 [cited by applicant]
US 6469732B1 · Chang et al. · 2002 [cited by applicant]
US 6593956B1 · Potts et al. · 2003 [cited by applicant]
US 6912178B2 · Chu et al. · 2005 [cited by applicant]
US 6912718B1 · Chang et al. · 2005 [cited by applicant]
US 7130705B2 · Amir et al. · 2006 [cited by applicant]
US 7254241B2 · Rui et al. · 2007 [cited by applicant]
US 7489788B2 · Leung et al. · 2009 [cited by applicant]
US 7720232B2 · Oxford et al. · 2010 [cited by applicant]
US 7848531B1 · Vickers et al. · 2010 [cited by applicant]
US 7995768B2 · Miki et al. · 2011 [cited by applicant]
US 8185387B1 · Lachapelle · 2012 [cited by applicant]
US 8861537B1 · Braithwaite · 2014 [cited by examiner]
US 8953819B2 · Ko et al. · 2015 [cited by applicant]
US 9706292B2 · Duraiswami et al. · 2017 [cited by applicant]
US 9800964B2 · McIntosh et al. · 2017 [cited by applicant]
US 10003900B2 · Cartwright et al. · 2018 [cited by applicant]
US 10042038B1 · Lord et al. · 2018 [cited by applicant]
US 10063987B2 · McGibney · 2018 [cited by applicant]
US 10229697B2 · Bastyr et al. · 2019 [cited by applicant]
US 10237639B2 · McIntosh et al. · 2019 [cited by applicant]
US 10387108B2 · McGibney · 2019 [cited by applicant]
US 10397726B2 · McGibney · 2019 [cited by applicant]
US 10848896B2 · McGibney · 2020 [cited by applicant]
US 10972835B2 · Rollow, IV · 2021 [cited by applicant]
US 11127415B2 · Magnusson et al. · 2021 [cited by applicant]
US 11190871B2 · Yorga et al. · 2021 [cited by applicant]
US 20050280701A1 · Wardell · 2005 [cited by applicant]
US 20060034469A1 · Tamiya et al. · 2006 [cited by applicant]
US 20060165242A1 · Miki et al. · 2006 [cited by applicant]
US 20080085014A1 · Chen et al. · 2008 [cited by applicant]
US 20080107277A1 · Somasundaram et al. · 2008 [cited by applicant]
US 20080285771A1 · Tanaka et al. · 2008 [cited by applicant]
US 20090129609A1 · Oh et al. · 2009 [cited by applicant]
US 20100034397A1 · Nakadai et al. · 2010 [cited by applicant]
US 20100135118A1 · Van Leest et al. · 2010 [cited by applicant]
US 20110135125A1 · Zhan et al. · 2011 [cited by applicant]
US 20120093344A1 · Sun et al. · 2012 [cited by applicant]
US 20120245933A1 · Flaks et al. · 2012 [cited by applicant]
US 20130083934A1 · Ahgren · 2013 [cited by applicant]
US 20130101134A1 · Betts-Lacroix · 2013 [cited by applicant]
US 20130142342A1 · Del Galdo et al. · 2013 [cited by applicant]
US 20130258813A1 · Herre et al. · 2013 [cited by applicant]
US 20140050328A1 · Fischer · 2014 [cited by applicant]
US 20140098964A1 · Rosca et al. · 2014 [cited by applicant]
US 20140119552A1 · Beaucoup · 2014 [cited by applicant]
US 20140133666A1 · Tanaka et al. · 2014 [cited by applicant]
US 20140185824A1 · Burnett · 2014 [cited by applicant]
US 20140314251A1 · Rosca et al. · 2014 [cited by applicant]
US 20140348342A1 · Laaksonen et al. · 2014 [cited by applicant]
US 20150185312A1 · Gaubitch et al. · 2015 [cited by applicant]
US 20150222996A1 · Chu et al. · 2015 [cited by applicant]
US 20150230026A1 · Eichfeld et al. · 2015 [cited by applicant]
US 20160071526A1 · Wingate et al. · 2016 [cited by applicant]
US 20160112469A1 · Liu · 2016 [cited by applicant]
US 20160173976A1 · Podhradsky · 2016 [cited by applicant]
US 20170178628A1 · Macours · 2017 [cited by examiner]
US 20170347217A1 · Mcgibney · 2017 [cited by applicant]
US 20170366896A1 · Adsumilli et al. · 2017 [cited by applicant]
US 20170374454A1 · Bernardini et al. · 2017 [cited by applicant]
US 20180074782A1 · McGibney · 2018 [cited by applicant]
US 20180098174A1 · Goodwin et al. · 2018 [cited by applicant]
US 20180249267A1 · Klingler et al. · 2018 [cited by applicant]
US 20190349471A1 · Ferguson · 2019 [cited by examiner]
US 20210035563A1 · Cartwright et al. · 2021 [cited by applicant]
US 20220004355A1 · McGibney · 2022 [cited by applicant]
EP 0903055B1 · 2007 [cited by applicant]
EP 2975609A1 · 2016 [cited by applicant]
JP 3154468B2 · 2001 [cited by applicant]
JP 2018026701A · 2018 [cited by applicant]
WO 03010995A2 · 2003 [cited by applicant]
WO 2022118072A1 · 2022 [cited by applicant]
Non-Final Office Action dated Oct. 11, 2023, from U.S. Appl. No. 17/516,480, 40 sheets. [cited by applicant]
Notice of Allowance dated Feb. 7, 2024, from U.S. Appl. No. 17/516,480, 10 sheets. [cited by applicant]
Communication pursuant to Article 94(3) EPC dated Feb. 29, 2024, from European Patent Application No. 21204322.8, 9 sheets. [cited by applicant]
Communication pursuant to Article 94(3) EPC dated Mar. 12, 2024, from European Patent Application No. 19808293.5, 6 sheets. [cited by applicant]
Theodoropoulos D et al.: “A reconfigurable beamformer for audio applications”, 7th Symposium on Application Specific Processors, 2009. SASP '09. IEEE,, Jul. 27, 2009, pp. 80-87, XP031522047, ISBN: 978-1-4244-4939-2. [cited by applicant]
International Search Report and Written Opinion mailed Sep. 15, 2017, from International Application No. PCT/CA2017/050642, 12 sheets. [cited by applicant]
Joseph Hector Dibiase, Thesis entitled, “A High-Accuracy, Low-Latency Technique for Talker Localization in Reverberant Environments Using Microphone Arrays”, Brown University, May 2000. [cited by applicant]
Notice of Allowance dated Apr. 30, 2018, from U.S. Appl. No. 15/597,646, 18 sheets. [cited by applicant]
International Search Report and Written Opinion mailed Jun. 7, 2023, from International Application No. PCT/CA2023/50412, 11 sheets. [cited by applicant]
Extended European Search Report mailed May 7, 2019, from European Patent Application No. 17805437.5, 23 sheets. [cited by applicant]
Notice of Allowance dated May 24, 2019, from U.S. Appl. No. 16/110,393, 6 sheets. [cited by applicant]
Non-Final Rejection dated Sep. 17, 2018, from U.S. Appl. No. 16/110,393, 14 sheets. [cited by applicant]
International Search Report and Written Opinion mailed Oct. 12, 2017, from International Application No. PCT/CA2017/050676, 8 sheets. [cited by applicant]
Notice of Allowance dated Apr. 2, 2019, from U.S. Appl. No. 15/603,986, 42 sheets. [cited by applicant]
Final Rejection dated May 25, 2018, from U.S. Appl. No. 15/603,986, 13 sheets. [cited by applicant]
Non-Final Rejection dated Jan. 24, 2018, from U.S. Appl. No. 15/603,986, 26 sheets. [cited by applicant]
Communication pursuant to Article 94(3) EPC dated Feb. 17, 2020, from European Patent Application No. 17805437.5, 6 sheets. [cited by applicant]
Notice of Allowance dated Jul. 16, 2020, from U.S. Appl. No. 16/518,013, 19 sheets. [cited by applicant]
Non-Final Rejection dated Feb. 28, 2020, from U.S. Appl. No. 16/518,013, 21 sheets. [cited by applicant]
Notice of Allowance dated Apr. 11, 2019, from U.S. Appl. No. 16/110,393, 18 sheets. [cited by applicant]
Notice of Allowance dated Jan. 19, 2018, from U.S. Appl. No. 15/597,646, 22 sheets. [cited by applicant]
Notice of Allowance dated Aug. 16, 2021, from U.S. Appl. No. 17/097,560, 33 sheets. [cited by applicant]
Extended European search report from European Application No. 20194651.4 with a mailing date of Jan. 21, 2021, 11 sheets. [cited by applicant]
Extended European search report from European Application No. 17847841.8 with a mailing date of Jun. 28, 2019, 12 sheets. [cited by applicant]
Communication pursuant to Rules 70(2) and 70a(2) EPC from European Application No. 17847841.8 with a mailing date of Jul. 16, 2019, 1 sheet. [cited by applicant]
U.S. Appl. No. 62/343,512, filed May 31, 2016, 41 sheets. [cited by applicant]
U.S. Appl. No. 62/162,091, filed May 15, 2015, 52 sheets. [cited by applicant]
U.S. Appl. No. 62/345,208, filed Jun. 3, 2016, 44 sheets. [cited by applicant]
Non-Final Rejection dated Feb. 9, 2021, from U.S. Appl. No. 16/434,725, 72 sheets. [cited by applicant]
Notice of Allowance dated Jan. 25, 2023, from U.S. Appl. No. 17/374,585, 11 sheets. [cited by applicant]
Notice of Allowance dated Jan. 19, 2023, from U.S. Appl. No. 17/374,585, 41 sheets. [cited by applicant]
Non-Final Rejection dated Aug. 8, 2022, from U.S. Appl. No. 17/374,585, 57 sheets. [cited by applicant]
The extended European search report completed Feb. 2, 2022 (dated Feb. 10, 2022), from European Application No. 19808293.5, 8 sheets. [cited by applicant]
Emanuël A. P. Habets and Jacob Benesty, “A Two-Stage Beamforming Approach for Noise Reduction and Dereverberation”, IEEE Transactions on Audio, Speeach, and Language Processing, vol. 21, No. 5, May 2013, pp. 945-958. [cited by applicant]
Gerhard Doblinger, “An Adaptive Microphone Array for Optimum Beamforming and Noise Reduction”, 14th European Signal Processing Conference (EUSIPCO 2006), Florence, Italy, Sep. 4-8, 2006, 5 sheets. [cited by applicant]
Taylor B. Spalt, Christopher R. Fuller, Thomas F. Brooks, William M. Humphreys, Jr., “A Background Noise Reduction Technique using Adaptive Noise Cancellation for Microphone Arrays”, p. 1-16, available at: https://ntrs.… [cited by applicant]
International Search Report and Written Opinion dated Oct. 3, 2019, from PCT/CA2019/050708, 9 sheets. [cited by applicant]
Notice of Allowance dated Feb. 10, 2023, from U.S. Appl. No. 16/421,908, 24 sheets. [cited by applicant]
Final Rejection dated Oct. 11, 2022, from U.S. Appl. No. 16/421,908, 26 sheets. [cited by applicant]
Non-Final Rejection dated Apr. 20, 2022, from U.S. Appl. No. 16/421,908, 38 sheets. [cited by applicant]
International Search Report and Written Opinion dated Jun. 15, 2023, from International Application No. PCT/CA2023/050371, 7 sheets. [cited by applicant]
International Search Report and Written Opinion dated May 30, 2023, from International Application No. PCT/CA2023/050277, 7 sheets. [cited by applicant]
The extended European search report dated Sep. 27, 2022, from European Patent Application No. 20749339.6, 15 sheets. [cited by applicant]
International Search Report and Written Opinion mailed May 22, 2020, from International Application No. PCT/CA2020/050100, 4+sheets. 10 pages. [cited by applicant]
Non-Final Rejection dated Dec. 10, 2020, from U.S. Appl. No. 16/774,258, 28 sheets. [cited by applicant]
Notice of Allowance dated Jul. 26, 2021, from U.S. Appl. No. 16/774,258, 21 sheets. [cited by applicant]
Lightspeed Technologies, “Audio Solutions for Classroom Reopening Challenges”, Duplicom Presentation Systems, https://www.duplicom.com/products/lightspeed-audio-solutions/, Aug. 27, 2020, 7 sheets. [cited by applicant]
Luis Guerra, Troy Jensen, “How to Use the Shure MXA910 Ceiling Array Microphone for Voice Lift”, Shure Incorporated, USA, Created Sep. 2016, upated Jul. 2018, Shure Incorporated, 11 sheets. [cited by applicant]
Alberta Infrastructure, “Sound-Field Systems Guide for Classrooms”, published in May 2004, 19 sheets. [cited by applicant]
The extended European Search Report dated Feb. 11, 2022, from European Patent Application No. 21204322.8, 7 sheets. [cited by applicant]
International Search and Written Opinion dated Jul. 18, 2022, from PCT/CA2022/050731, 8 sheets. [cited by applicant]
Communication pursuant to Article 94(3) EPC dated Oct. 14, 2024, from European Patent Application No. 20749339.6-1207, 10 sheets. [cited by applicant]
International Search Report and Written Opinion mailed Aug. 9, 2024, for International Patent Application No. PCT/CA2024/050615, 9 sheets. [cited by applicant]
Office Action dated Feb. 7, 2025, from U.S. Appl. No. 18/126,739, 54 sheets. [cited by applicant]
The extended European search report dated Feb. 13, 2025, from European Patent Application No. 008516734, 11 sheets. [cited by applicant]
Unknown: “Microphone Array System System Integration Guide”, Jan. 4, 2021 (Jan. 4, 2021), pp. 1-118, XP093246046, Retrieved from the Internet: URL:https://www.sony.com/electronics/support/res/manuals/5020/cdb05a7ca4b63c… [cited by applicant]
Slattery Mike: “Speech Reinforcement”, Nov. 6, 2011 (Nov. 6, 2011), pp. 1-4, XP093246545, Retrieved from the Internet: URL:https://web.archive.org/web/20111106212236if_/http://rane.com/pdf/ranenotes/Introduction_to_Spee… [cited by applicant]
Cited By (1)
US 12,705,959