A method and device for generating synthetic vortex sound field (SVSF) with more mode number includes the following steps: (1) a transducer array composed of N transducer units is constructed, and each transducer unit emits a sound field to generate an initial sound field; (2) at the same time, the position of the transducer unit and the phase of the sound field emitted by each transducer unit are changed, and each change produces a sound field, and thus changings times produces of sound fields, wherein the way to change the position of the transducer unit is to rotate the transducer array as a whole; (3) the initial sound field is superimposed with s of sound fields generated in step (2), to obtain SVSF with more mode number. The method and device for generating vortex sound field (VSF) can be used for underwater communication or acoustic imaging.

A sound field control apparatus includes a microphone configured to receive an utterance of a user, an output interface configured to output at least one of a sound signal and image data, and one or more processors configured to cancel a sound signal in a specific area around the microphone, obtain room impulse response information based on a user utterance position when the utterance of the user is received, and output a sound signal for providing an independent sound field to the user based on the room impulse response information.

An integrated audio microphone system simultaneously provides in-room amplification and remote communication during a collaboration session with one or more local participants in a shared space and one or more remote participants. The integrated audio microphone system includes at least one microphone array and speaker system located in the shared space, at least one microphone system for amplification located in the shared space, an audio processor connected to the microphone system and the microphone array and speaker system, and a computer connected to the audio processor. The audio processor is configured to generate a plurality of virtual microphone bubbles and to amplify received audio signals from the microphone system for in-room audio amplification. The amplified audio signals are output to speakers of the microphone array and speaker system. Audio signals from the microphone system and the arrays of microphones are output to the computer to send the audio signals to one or more remote participants.

Some implementations involve receiving a content stream that includes audio data, receiving at least one type of level adjustment indication relating to playback of the audio data and controlling a level of the input audio data, based on the at least one type of level adjustment indication, to produce level-adjusted audio data. Some examples involve determining, based at least in part on the type(s) of level adjustment indication, a multiband limiter configuration, applying the multiband limiter to the level-adjusted audio data, to produce multiband limited audio data and providing the multiband limited audio data to one or more audio reproduction transducers of an audio environment.

Example techniques relate to audio generation in a media playback system. Based on one or more first functions and first characteristics of an area, the system may generate first audio that includes a first audio signal and a second audio signal. The system provides the first audio signal to at least one first audio driver and the second audio signal to at least one second audio driver, thereby causing a first playback device and a second playback device to play back the first audio synchronously. The system receives second characteristics of the area and based on one or more second functions and the second characteristics, generates second audio comprising a third audio signal and a fourth audio signal. The system provides the third audio signal to the at least one first audio driver and the fourth audio signal to the at least one second audio driver.

In an audio spot formation device D including a speaker unit 1 and a support stand 2 that supports the speaker unit 1, the speaker unit 1 includes a plurality of parametric speakers 1a, 1b, 1c and 1d that divide a sound wave into a carrier wave and a sideband wave and radiate the carrier wave and the sideband wave, and a speaker disposition unit 10 in which the plurality of speakers 1a, 1b, 1c and 1d are disposed, the speaker disposition unit 10 is attached to the support stand 2 at a support unit P, at least one of a height of the support stand 2, an angle of attachment of the speaker disposition unit 10 at the support unit P and a direction of at least one parametric speaker of the plurality of parametric speakers 1a, 1b, 1c and 1d is adjustable, and a position at which an audio spot is formed is adjusted via the adjustment.

A loudspeaker including a first diaphragm, a second diaphragm spaced from the first diaphragm, a first voice coil coupled to the first diaphragm, a second voice coil coupled to the second diaphragm, and a magnet assembly. The magnet assembly includes a magnet, a magnetic piece and a spacer of non-magnetic material connecting the magnet and the magnetic piece such that a gap is provided between the magnet and the magnetic piece. The first voice coil is arranged at a first end of the gap and the second voice coil is arranged at a second end of the gap opposite the first end of the gap.

Systems and methods for mapping noise via a plurality of playback devices within an environment are disclosed herein. In one example, a plurality of playback devices can each output audio and also detect sound within the environment to obtain respective sound data specimens. For each playback device, the respective sound data specimen can be analyzed to obtain a respective noise determination. A spatial map of the noise determinations within the environment can then be constructed. A visual representation of the spatial map can further be presented to a user. In response to the noise determinations and/or a user input, the audio output via at least one of the playback devices can be modified, for example to mask or suppress noise within one or more regions of the environment.

Embodiments disclosed herein include managing playback devices with limited capabilities and playback devices with advanced capabilities by way of a control device. In some embodiments, the control device may control a first playback device by way of a legacy control application including a first control interface comprising first playback controls operable to control the first playback device in performing a set of legacy playback functions. The mobile device may control a second playback device by way of a production control application including a second control interface comprising second playback controls operable to control the second playback device in performing a set of production playback functions.

The invention relates, inter alia, to an equipment part for a vehicle, including a base, at least one first foam layer and a covering, wherein the equipment part is provided with at least one audio cushion device which has at least one loudspeaker device having at least one loudspeaker, wherein each loudspeaker has a sound outlet. The first foam layer has an opening which extends along a center axis of the sound outlet such that the sound can continue through the opening in the direction toward the covering. A sound-permeable carrier layer covers the opening and in the direction of the sound propagation behind the carrier layer a second foam layer is arranged which engages over the opening.