An audio device having an improved bendable structure is disclosed. The audio device includes an amplifier unit configured to amplify an audio signal, at least one speaker unit configured to output the amplified audio signal as a sound signal, and at least one link unit rotatably connecting the at least one speaker unit to the amplifier unit.

A noise suppressing apparatus calculates a phase difference on the basis of a first and second sound signal obtained by a microphone array; calculates a first sound arrival rate on the basis of a first phase difference area and the phase difference and a second sound arrival rate on the basis of a second phase difference area and the phase difference; calculates a dissimilarity that represents a level of difference between the first sound arrival rate and the second sound arrival rate; determines whether the pickup target sound is included in the first sound signal on the basis of the dissimilarity; and determines a suppression coefficient to be applied to the frequency spectrum of the first sound signal, on the basis of a result of the determination of whether the pickup target sound is included and on the basis of the phase difference.

Described herein is a sensor probe for association with a portion of an aircraft. The sensor probe includes a microphone assembly having a portion configured to receive audio signals. The sensor probe further includes a nosecone associated with the microphone assembly. The nosecone assembly is configured to shield the portion of the microphone assembly from noise generated by direct impact of an airflow for a plurality of local flow angles.

A MEMS loudspeaker arrangement for generating sound waves in the audible wavelength spectrum includes a housing that defines a sound-conducting channel and a sound outlet arranged at the end of the sound-conducting channel. At least two MEMS loudspeakers are arranged in the interior of the housing so that they generate sound waves through the sound-conducting channel to the sound outlet. One of the MEMS loudspeakers is disposed downstream of the other in the direction of the sound outlet. A control unit is connected to control the MEMS loudspeakers so as to increase the maximum loudness of the MEMS loudspeaker arrangement. The first of the two MEMS loudspeakers is controlled to function as a sound generator for generating an initial wave, and the second MEMS loudspeaker is controlled to function as a sound amplifier for amplifying the initial wave.

A column loudspeaker with a line of low-frequency drivers has a center coaxial driver with a low frequency driver and a high frequency drive. The low frequency drivers are delayed and gain adjusted such that they exhibit constant directivity in the axis of the line. The high frequency driver has the same directivity as the line of low frequency drivers. A crossover separates the audio signal into high and low frequency signals with low frequency signals sent to the low frequency drivers, and high frequency signals sent to the high frequency element in the coaxial driver. The crossover frequency is in the frequency range where the directivity of the high and low frequency drivers match. The loudspeaker cabinet is curved to provide an acoustic delay to the drivers further away from the center coaxial driver.

A differential microphone array includes a number (M) of microphone sensors for converting sound to a number of electrical signals, and a processor, operably coupled to the microphone sensors, to specify a target differential order (N) for the differential microphone array, and wherein M>N+1, specify a steering matrix D comprising N+1 steering vectors, calculate a respective one of a plurality of linearly specify a steering matrix D comprising N+1 steering vectors-constrained minimum variance filters based on the steering matrix, apply the respective one of the plurality of linearly-constrained minimum variance filters to a respective one of the electrical signals to calculate a respective frequency response of the electrical signals, wherein the respective frequency response comprises a plurality of components associated with a plurality of subbands, and sum the frequency responses of the electrical signals with respect to each subband to calculate an estimated frequency spectrum of the sound.

Determination of a composite acoustic parameter value for a headset is presented herein. A directionally enhanced audio signal is generated based on audio signals from an acoustic sensor array and a spatial signal enhancement filter that is directed for enhancement of a sound source. A SNR improvement value is determined based on a SNR value of the directionally enhanced audio signal and a SNR value of an audio signal from an acoustic sensor of the acoustic sensor array. The SNR improvement value is input into a model that maps SNR improvement values to spatial acoustic parameters to determine a spatial acoustic parameter. A temporal acoustic parameter is determined based on the audio signals. The composite acoustic parameter value is determined based on the spatial acoustic parameter and a temporal acoustic parameter value. Audio content presented to a user is adjusted based in part on the composite acoustic parameter value.

Specifically programmed, integrated motor vehicle dangerous driving warning and control system and methods comprising at least one specialized communication computer machine including electronic artificial intelligence expert system decision making capability further comprising one or more motor vehicle electronic sensors for monitoring the motor vehicle and for monitoring activities of the driver and/or passengers including activities related to the use of cellular telephones and/or other wireless communication devices and further comprising electronic communications transceiver assemblies for communications with external sensor networks for monitoring dangerous driving situations, weather conditions, roadway conditions, pedestrian congestion and motor vehicle traffic congestion conditions to derive warning and/or control signals for warning the driver of dangerous driving situations and/or for controlling the motor vehicle driver use of a cellular telephone and/or other wireless communication devices.

A sound receiving system is disclosed, each of the plurality of basic array devices has an output terminal connected with one filter, each of the plurality of filters has an output terminal connected with an input terminal of the second sound-mixing output device; the basic array device includes a microphone array, the microphone array includes a plurality of microphones longitudinally arranged along a straight line in order, and two adjacent microphones in the microphone array are separated with a distance of $\frac{1}{n}\lambda ;$
each microphone has an output terminal connected with one of the time delay circuits, each time delay circuit has an output terminal connected with an input terminal of the first sound-mixing output device; and the i-th time delay circuit has a delay time defined by adding (n-i) times of unit time to a delay time of the last time delay circuit. The present invention can increase the output of the forward acoustic wave actuation, decrease the output of the oblique acoustic wave within a center frequency bandwidth, and obtain a required directional characteristic. The present invention can be widely used in sound pickup (sound transmitting) applications.

Various implementations include speaker systems. In one implementation, a self-powered speaker system includes: a first module, having: a processor; an audio signal and control connector coupled with the processor and enabling audio signal and control communication between the processor and another module in the speaker system; a dedicated power supply for the speaker system; a front end backup power supply; and a power connector coupled with the dedicated power supply and the front end backup power supply, the power connector enabling input power to the dedicated power supply and output power from the front end backup power supply.