This disclosure describes systems, methods, and devices related to noise suppression processing. A device may establish a connection to a connected device. The device may calculate a first SNR of a first sample of a first audio stream from the connected device. The device may calculate a second SNR of a second sample of a second audio stream from a first device. The device may compare a difference of the first SNR and the second SNR to a Delta SNR threshold. The device may detect ambient noise level conditions and the Delta SNR threshold is based on the ambient noise level conditions. The device may determine whether to apply system-level preprocessing based on the comparison.

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.

An electronic device comprising a display unit operable under different operating modes based on a structure of the display unit, and first and second sound acquisition units that acquire sound in a first or second operating mode based on a first or second structure of the display unit. Also provided is a method for controlling an electronic device comprising steps of determining whether a display unit is in a first or second mode, where the display unit is in the first mode when all parts on the display unit are on a same plane, and in the second mode when at least two parts on the display unit are not on the same plane; controlling a first sound acquisition unit to work when the display unit is in the first mode; and controlling a second sound acquisition unit to work when the display unit is in the second mode.

An ear interface mode of headphones may be determined by measuring an acoustic response of the headphones. For example, the headphones may be determined to be in a leaky or sealed configuration. An adaptive noise cancellation (ANC) system may be controlled based on the determined ear interface mode of the headphones. For example, a set of configuration parameters may be loaded for the ANC system corresponding to the known ear interface mode. An anti-noise signal may be generated according to the selected configuration parameters, and that anti-noise signal added during playback of media, such as voice recordings, music, videos, or telephone call speech.

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.

An active noise reduction system includes a canceling sound output device configured to output a canceling sound for canceling a noise, a noise signal generator configured to generate noise signals based on the noise, and a controller configured to control the canceling sound output device based on the noise signals, wherein the controller is configured to acquire buffer data in which the noise signals are stored in a time series, generate a plurality of divided data by dividing the buffer data, calculate a correlation value of the buffer data based on the plurality of divided data, detect presence/absence of disturbance mixed in the buffer data based on the correlation value, and switch control over the canceling sound output device according to the presence/absence of the disturbance mixed in the buffer data.

An open wearable acoustic device and an active noise reduction method are provided. The acoustic device includes a first sound sensor module, a speaker, and a noise reduction circuit. The noise reduction circuit may obtain a first sound signal from the first sound sensor module, select a target noise reduction mode from a plurality of noise reduction modes based on the first sound signal, and execute the target noise reduction mode. This solution can adaptively adjust a noise reduction mode based on a noise condition of an external environment of the acoustic device, so that an active noise reduction process of the acoustic device is more in line with the noise condition of a current environment, thereby improving a noise reduction effect of the acoustic device.

An electronic device comprising a display unit operable under different operating modes based on a structure of the display unit, and first and second sound acquisition units that acquire sound in a first or second operating mode based on a first or second structure of the display unit. Also provided is a method for controlling an electronic device comprising steps of determining whether a display unit is in a first or second mode, where the display unit is in the first mode when all parts on the display unit are on a same plane, and in the second mode when at least two parts on the display unit are not on the same plane; controlling a first sound acquisition unit to work when the display unit is in the first mode; and controlling a second sound acquisition unit to work when the display unit is in the second mode.

A system and method for reducing or entirely canceling background or ambient noise from a voice transmission from a communications device. A communications device, such as a mobile telephone, is configured with an ambient noise compensation signal generator that is connected between a first microphone and a mixer. A second microphone is employed to detect ambient noise. An original output of the first microphone and a compensation signal generated by the ambient noise compensation signal generator are mixed together prior to being passed to a transmitter. A buffer is provided between the microphone and the mixer to help synchronize the timing of the signals to be mixed and an output of the mixer is provided to an antenna.

A noise canceling disablement system is provided to enables a user to hear select conversational speech directed at the user while wearing a noise cancelling hearable device. The disablement system automatically at least partial disables the noise canceling feature of the hearable device in response to recognizing conversational speech of a speaking person within a detected conversation zone of the user. In some cases, triggering of the noise canceling disablement further requires the speaking person to be identified by the system as significant person of the user.