Hewlett-packard Development Company, L.p.

American Technology Corporation

Parametric Sound Corporation

Wensen Liu

James J Croft, Iii

Sunil Bharitkar

Madhu Sudan Athreya

Richard F Sweet

Norbert P Daberko

HyunWoo Choi

Clifton Wynn Thompson

In some examples, adaptive speech intelligibility control for speech privacy may include determining, based on background noise at a near-end of a speaker, a noise estimate associated with speech emitted from the speaker, and comparing, by using a specified factor, the noise estimate to a speech level estimate for the speech emitted from the speaker. Adaptive speech intelligibility control for speech privacy may further include determining, based on the comparison, a gain value to be applied to the speaker to produce the speech at a specified level to maintain on-axis intelligibility with respect to the speaker, and applying the gain value to the speaker.

Adaptive speech intelligibility control for speech privacy

In some examples, an acoustic input device includes a housing comprising a plurality of acoustic ports, and a plurality of single-port acoustic transducers within the housing to receive respective acoustic waves from an environment outside the acoustic input device through corresponding acoustic ports of the plurality of acoustic ports, where a first acoustic port of the plurality of acoustic ports is located on a first surface of the housing, and a second acoustic port of the plurality of acoustic ports is located on a second surface of the housing that is opposite the first surface. The acoustic input device further includes a controller within the housing to receive outputs of the plurality of acoustic transducers.

Acoustic input devices comprising acoustic ports and transducers

Described herein is a technology related to a mobile device with a pair of stereo speakers. The mobile device has an orientation detection system that detects the orientation of the mobile device and a crosstalk cancellation system that performs crosstalk cancellation with complementary cardioid beams in response to the detected orientation of the mobile device. The mobile device also has an audio system that emits complementary cardioid sound beams from the speakers.

Crosstalk cancellation for stereo speakers of mobile devices

A system and methods for distortion reduction in a non-linear audio system are disclosed. A method includes the operation of defining a non-linear system transfer function which relates a system electronic input signal with a system acoustic output over a range in which the system acoustic output is in a transition between non-saturated and saturated conditions in a medium in which the system acoustic output of the non-linear audio system is broadcast. A preprocessing transfer function is created that is the inverse of the non-linear system transfer function. The preprocessing transfer function is applied to the system electronic input signal to reduce the level of harmonic distortion at the system acoustic output.

Audio distortion correction for a parametric reproduction system

A directional acoustic device configured for producing a directional output along an acoustic axis, including at least one transducer configured to create at least two wave trains which are directed along differing pathways by at least one wave guide, and so disposed that in directions more than ninety degrees off the acoustic axis the SPL of the output is greatly diminished by cancellation effects between the wave trains; improvement over previous gradient and quarter-wave pipe directional systems being enabled.

Growing community of inventors

San Diego, CA, United States of America

Wensen Liu