A system that includes a microphone array comprising a plurality of microphones positioned at different locations, where the microphones output microphone signals. A beamformer is applied to the microphone output signals and is configured to control a gain that is applied to the microphone output signals. The gain is frequency dependent and is related to a mismatch in sensitivity between two or more of the microphones.

An earpiece body with a convoluted acoustic horn and a hearing protection device that includes the earpiece body. The convoluted acoustic horn that is configured to receive airborne sound waves through a first, sound-receiving opening and to emit airborne sound waves through a second, sound-emitting opening, wherein the first, sound-receiving opening is larger in cross-sectional area than the second, sound-emitting opening.

An audio processing device comprises a) at least one input unit for providing time-frequency representation Y(k,n) of an electric input signal representing sound consisting of target speech and noise signal components, where k and n are frequency band and time frame indices, respectively, b) a noise detection and/or reduction system configured to b1) determine an a posteriori signal to noise ratio estimate (k,n) of said electric input signal, and to b2) determine an a priori target signal to noise signal ratio estimate (k,n) of said electric input signal from said a posteriori signal to noise ratio estimate (k,n) based on a recursive decision directed algorithm. The application further relates to a method of of estimating an a priori signal to noise ratio. The invention may e.g. be used for the hearing aids, headsets, ear phones, active ear protection systems, handsfree telephone systems, mobile telephones, etc.

(Fig. 1A should be published)

The present invention discloses a method of adjusting ambient sounds for an earphone. The earphone collects ambient sounds using at least one microphone. The method includes: determining an adjustment type and an adjustment amount for the collected ambient sounds; and adjusting, according to the determined adjustment type, the collected ambient sounds by the determined adjustment amount. The present invention also provides an earphone.

An earphone includes an acoustic transducer and a housing that includes a first acoustic chamber acoustically coupled to a first side of the acoustic transducer and a second acoustical chamber acoustically coupled to a second side of the acoustic transducer. The housing further includes a port acoustically coupling the first acoustic chamber and the second acoustic chamber. Acoustic resistive material is positioned proximate the port.

Methods and systems are disclosed for echo suppression of an input audio signal. A multimedia system and a remote control unit are configured to adaptively and dynamically preform calibration processes for obtaining sets of echo suppression parameters. The sets of echo suppression parameters are used to generate an audio signal from an input audio. When rendered by a speaker, the generated audio signal produces echo-suppressed sound of the input audio signal at one of more locations.

A noise signal is estimated based on a captured audio signal captured from a sound capture unit. It is determined whether the estimated noise signal thus estimated is in a noiseless state. If it is determined that the estimated noise signal is in the noiseless state, the captured audio signal is analyzed as a target sound signal, and a characteristic obtained by the analysis is learned and modeled, thereby generating a target sound model.

Methods, apparatus, systems and articles of manufacture to implement selective suppression of audio emitted from an audio source are disclosed. Example apparatus disclosed herein include a speaker, an audio output driver in communication with the speaker, memory including computer readable instructions, and a processor. In some disclosed example apparatus, the processor is to execute the instructions to perform operations including obtaining reference audio data corresponding to an audio signal to be output subsequently by the audio source and including identification data identifying the audio source, and in response to an input selection corresponding to the identification data, generating a suppression signal to provide to the audio output driver, the suppression signal based on the reference audio data and a time delay between a first time at which the reference audio data was received and a second time at which the audio signal is to be output by the audio source.

The disclosure is related to compositions including viscoelastic materials. The compositions are suitable for use in earpieces such as in-ear earpieces.

A flexible acoustic barrier for suspending from a support frame wherein the flexible acoustic barrier comprises a portion of acoustic insulation material and at least one loudspeaker that is configured to emit an audible sound-masking signal to mask sound from a sound source. Another aspect of the invention comprises a corresponding method of mitigating noise pollution.