Patent application number | Description | Published |
20130163767 | Signal Compression Based on Transducer Displacement - A method for adjusting the performance of an electroacoustic transducer includes receiving, by gain adjustment circuit, a displacement signal corresponding to a relative motion between a magnetic structure of the electroacoustic transducer and a voice coil of the electroacoustic transducer. The method includes detecting, by the gain adjustment circuit, a displacement signal value of the displacement signal as one of meeting or exceeding a displacement signal threshold. The method includes modifying, by the gain adjustment circuit, a loop gain of an active noise reduction loop associated with the electroacoustic transducer when the displacement signal value of the displacement signal one of meets or exceeds the displacement signal threshold. | 06-27-2013 |
20130322641 | FREQUENCY-DEPENDENT ANR REFERENCE SOUND COMPRESSION - An active noise reduction (ANR) circuit includes a digital feed-forward ANR pathway coupled to a feed-forward microphone, to detect environmental sounds in an environment external to a casing, and to a first acoustic driver to output sounds within the casing. The digital feed-forward ANR pathway applies a plurality of filters using a first set of coefficients to convert signals from the feed-forward microphone to feed-forward anti-noise sounds to reduce environmental sounds within the casing. In response to a stimulus, the digital feed-forward ANR pathway applies the plurality of filters using a second set of coefficients, which reduce the degree of feed-forward ANR to enable human speech sounds in the environment external to the casing to be conveyed from the feed-forward microphone to the acoustic driver with less reduction than provided by the first plurality of filters. | 12-05-2013 |
20140126734 | Providing Ambient Naturalness in ANR Headphones - In an active noise reducing headphone, a signal processor applies filters and control gains of both the feed-forward and feedback active noise cancellation signal paths. The signal processor is configured to apply first feed-forward filters to the feed-forward signal path and apply first feedback filters to the feedback signal path during a first operating mode providing effective cancellation of ambient sound, and to apply second feed-forward filters to the feed-forward signal path during a second operating mode providing active hear-through of ambient sounds with ambient naturalness. | 05-08-2014 |
20140341387 | PROVIDING AMBIENT NATURALNESS IN ANR HEADPHONES - In an active noise reducing headphone, a signal processor applies filters and control gains of both the feed-forward and feedback active noise cancellation signal paths. The signal processor is configured to apply first feed-forward filters to the feed-forward signal path and apply first feedback filters to the feedback signal path during a first operating mode providing effective cancellation of ambient sound, and to apply second feed-forward filters to the feed-forward signal path during a second operating mode providing active hear-through of ambient sounds with ambient naturalness. | 11-20-2014 |
20150271602 | Binaural Telepresence - A set of headphones have microphones generating left and right feed-forward and feedback signals. A processor filters the feed-forward signals to provide ambient naturalness to the signals and generate binaural ambient signals, filters the feedback signals to generate noise-cancelling signals, and combines the noise-cancelling signals and the binaural ambient signals to generate output signals for an output transducer. A transmitter transmits the binaural ambient signals. Another set of headphones have microphones generating left and right feed-forward and feedback signals and a receiver configured to receive binaural signals. A processor filters the feed-forward signals according to a predetermined headphone frequency response providing ambient naturalness to the signals and generate local binaural ambient signals, filters the feedback signals to generate noise-cancelling signals, and combines the binaural signals, the noise-cancelling signals, and the local binaural ambient signals to generate output signals. | 09-24-2015 |
20150281829 | Collaboratively Processing Audio between Headset and Source to Mask Distracting Noise - A media playback device has programmable signal processing capabilities and an input receiving signals representative of ambient noise. The media playback device identifies an output response characteristic and an attenuation characteristic of a set of headphones associated with the media playback device, predicts a property of audio output by the headphones at a user's ear based on the ambient noise input signal, the output response characteristic, and the attenuation characteristic of the headphones, predicts expected residual ambient noise at the user's ear, when wearing the headphones, derived from the ambient noise input signal and the attenuation characteristic, and modifies masking audio signals to be provided to the headphones such that they will mask the expected residual ambient noise at the user's ear. | 10-01-2015 |
20150281830 | Collaboratively Processing Audio between Headset and Source - A media playback device has programmable signal processing capabilities and an input receiving signals representative of ambient noise. The media playback identifies an output response characteristic and an attenuation characteristic of a set of headphones associated with the media playback device, and dynamically modifies audio output signals to be provided to the headphones based on a combination of the output response characteristic, the attenuation characteristic, and the ambient noise input signal. | 10-01-2015 |
20150296061 | Providing Isolation from Distractions - An apparatus includes a first interface for connecting to a personal computer, a second interface for connecting to a communications device, a third interface for connecting to a headset, a fourth interface for connecting to a speaker, and a processor in control of each of the interfaces. The processor is configured to route audio associated with a communications session on one of the personal computer or the communications device to the speaker, and in response to a user putting on the headset, re-route the audio to the headset. | 10-15-2015 |