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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 8170884 | Use of voice-to-remaining audio (VRA) in consumer applications Systems provide an audio/visual output to each of a plurality of listeners in a manner that permits individualized audio adjustment, wherein audio comprises a first signal that is substantially voice and a second signal that is substantially other than voice. The sy... | 05/01/2012 |
| 8108220 | Techniques for accommodating primary content (pure voice) audio and secondary content remaining audio capability in the digital audio production process The invention enables the inclusion of voice and remaining audio information at different parts of the audio production process. In particular, the invention embodies special techniques for VRA-capable digital mastering, accommodation of PCPV/PCA and/or SCRA signals... | 01/31/2012 |
| RE42737 | Voice-to-remaining audio (VRA) interactive hearing aid and auxiliary equipment An integrated individual listening device and decoder for receiving an audio signal including a decoder for decoding the audio signal by separating the audio signal into a voice signal and a background signal, a first end-user adjustable amplifier coupled to the voi... | 09/27/2011 |
| 7415120 | User adjustable volume control that accommodates hearing A method for processing audio signals optimizes the listening experience for hearing impaired listeners, as well as non-hearing impaired listeners, without forcing hearing impaired individuals to feel stigmatized by requiring them to employ special hearing-impaired ... | 08/19/2008 |
| 7337111 | Use of voice-to-remaining audio (VRA) in consumer applications Systems provide an audio/visual output to each of a plurality of listeners in a manner that permits individualized audio adjustment, wherein audio comprises a first signal that is substantially voice and a second signal that is substantially other than voice. The sy... | 02/26/2008 |
| 7266501 | Method and apparatus for accommodating primary content audio and secondary content remaining audio capability in the digital audio production process The invention enables the inclusion of voice and remaining audio information at different parts of the audio production process. In particular, the invention embodies special techniques for VRA-capable digital mastering, accommodation of PCPV/PCA and/or SCRA signals... | 09/04/2007 |
