Abstract: An unmanned aircraft includes: rotor blades; a duct that shrouds the rotor blades and through which airflow generated by rotation of the rotor blades passes; and a processor that controls rotation of the rotor blades. The height to width ratio of an inner space of the duct in which the rotor blades are shrouded is at least 0.5.

Abstract: A headset includes a speaker, such as a side firing dipole speaker. The headset includes a front chamber that receives sound waves from a first side of the speaker and a rear chamber that receives sound waves from a second side of the speaker. A control leak channel connects the front chamber and the rear chamber. An acoustic mesh may be located within the control leak channel. The speaker configuration is configured to reduce total harmonic distortion of the speaker, particularly in ranges such as 3-6 kHz, while maintaining the broadband efficiency of the speaker.

Abstract: An active noise cancellation (ANC) system is provided with at least one loudspeaker to project an anti-noise sound within a room in response to receiving an anti-noise signal. A first controller is programmed to adjust a transfer function indicative of a secondary path between the at least one loudspeaker and at least one microphone within the room based on a resonance frequency of the at least one loudspeaker, and to generate the anti-noise signal based on the adjusted transfer function.

Abstract: A method performed by a control device includes transmitting, to a first device, a signal for configuring an audio data output volume of the first device as a reference value, transmitting, to the first device, a test stream for calibration on an audio data output volume of devices consisting of a multi-channel surround system, and measuring an audio data output of the first device based on the reference value and the test stream. Further operations include transmitting, to second and third devices, a signal for configuring an audio data output volume of each of the second and third devices as a specific value, transmitting the test stream to the second and third devices, and measuring audio data outputs of each of the second and third devices which is outputted based on the specific value and the test stream.

Abstract: A virtual reproduction signal generation unit generates a virtual reproduction signal based on a sound pickup signal of a stereophonic sound at a listening position in a compartment, assuming that virtual speakers are respectively located at portions of Np positions in a vehicle, the virtual reproduction signal causing the virtual speakers of the Np positions to reproduce the stereophonic sound. A virtual prediction signal generation unit generates a virtual prediction signal based on the virtual reproduction signal and an information representing a change of acoustic characteristics when at least part of the portions of the Np positions is changed, the virtual prediction signal causing the virtual speakers of the Np positions to output a predicted sound at the listening position. An output signal generation unit generates an output signal based on the virtual prediction signal, the output signal causing speakers of a plurality of positions to output the predicted sound.

Abstract: A sensor module comprising a housing defining an internal cavity, the housing including an aperture, at least one microphone positioned in the internal cavity spaced from the aperture, a first barrier proximate the aperture, and a second barrier positioned between the at least one microphone and the first barrier.

Abstract: Systems and methods for recording and playback of multi-dimensional sound are described herein. The systems and methods may include positioning a plurality of multi-dimensional sound recording devices in a location and positioning a plurality of multi-dimensional sound recording sensors within the location. Then, acoustical footprint data can be generated. Next, recording positional data within the location utilizing the plurality of multi-dimensional sound recording devices may occur. The systems and methods may continue to generate spatial data utilizing the recorded positional data and store the generated acoustical footprint data and spatial data. An audio mix-down utilizing the stored acoustical footprint and spatial data is generated. Finally, a consumer-device audio track mix based on the audio mix-down can be generated. Further embodiments may also replace audio tracks to mimic the original recording conditions in other languages and environment.

Abstract: Systems and methods for rendering spatial audio in accordance with embodiments of the invention are illustrated. One embodiment includes a spatial audio system, including a primary network connected speaker, including a plurality of sets of drivers, where each set of drivers is oriented in a different direction, a processor system, memory containing an audio player application, wherein the audio player application configures the processor system to obtain an audio source stream from an audio source via the network interface, spatially encode the audio source, decode the spatially encoded audio source to obtain driver inputs for the individual drivers in the plurality of sets of drivers, where the driver inputs cause the drivers to generate directional audio.

Abstract: The present disclosure relates to the technical field of earphone and provides to an active noise reduction earphone. The active noise reduction earphone includes an earphone shell, a speaker, a sound outlet mouth, a first feedback digital microphone, a second feedback digital microphone and a sound collecting channel. Herein, the speaker divides the earphone shell into the front speaker cavity and the back speaker cavity; the sound outlet mouth is arranged to be faced to the speaker to output the sound emitted by the speaker; the first feedback digital microphone is arranged at the first noise reduction sound collecting hole preset in the back speaker cavity to collect external ambient noise; the sound in the ear canal is collected through the sound collecting channel, and the second feedback digital microphone isolates the sound collecting channel from the front speaker cavity.

Abstract: Computer-implemented methods, computer program products, and computer systems configured for receiving first audio data from a first computing device via a first microphone, receiving second audio data from a second computing device via a second microphone, detecting a first user utterance having a first user utterance local decibel measure in the first audio data and a first user utterance remote decibel measure in the second audio data, detecting a second user utterance having a second user utterance local decibel measure in the second audio data and a second user utterance remote decibel measure in the first audio data, determining a first cancelling coefficient based on the second user utterance detected at the first microphone and the second user utterance detected at the second microphone, applying the first cancelling coefficient to the first audio data, and generating first output audio data comprising the first user utterance at the first computing device.

Abstract: The disclosure relates to a hearing system comprising a first hearing device and a second hearing device configured to be worn at a respective ear of a user, each hearing device comprising a displacement sensor configured to provide respective displacement data indicative of a rotational displacement and/or a translational displacement of the hearing device, and a processing unit communicatively coupled to the displacement sensors. The disclosure further relates to a corresponding method of operating a hearing system, and a computer-readable medium storing instructions to perform the method.

Abstract: Transducer steering and configuration systems and methods using a local positioning system are provided. The position and/or orientation of transducers, devices, and/or objects within a physical environment may be utilized to enable steering of lobes and nulls of the transducers, to create self-assembling arrays of the transducers, and to enable monitoring and configuration of the transducers, devices, and objects through an augmented reality interface. The transducers and devices may be more optimally configured which can result in better capture of sound, better reproduction of sound, improved system performance, and increased user satisfaction.

Abstract: An illustrative hearing system may be configured to cause an emitting device included in a hearing device to emit an output signal while the hearing device is at least partially positioned within an ear canal of a user and cause a sensor positioned outside the ear canal to attempt to detect the output signal. The sensor may be configured to output sensor data representative of one or more signals detected by the sensor during a time period corresponding to the emitting of the output signal by the emitting device. The hearing system may further be configured to determine, based on the sensor data, a quality metric for an optical measurement performed or to be performed by an optical measurement device included in the hearing device.

Abstract: An audio system includes: a speaker; a microphone that generates a microphone signal based on sound output from the speaker; a mixer module configured to generate a mixed signal by mixing the microphone signal with an audio signal; a filter module configured to filter the mixed signal to produce a filtered signal and to apply the filtered signal to the speaker; and a detector module configured to determine a howling frequency in the microphone signal attributable to sound output from the speaker, where the filter module is configured to decrease a magnitude of the filtered signal at the howling frequency.

Abstract: A microphone includes a tubular case having a bottom surface, a side surface and an opened top, a substrate which is fixed so as to block an opening portion of the opened top of the case, and has an electrode portion on an upper surface thereof, and a side-surface sound hole formed in the side surface of the case.

Abstract: An ultrasonic speaker comprises a case that has an opened top surface and includes a plurality of protrusions protruding inward on an inner side surface of the case, a piezoelectric element fixed to a bottom surface in the case, and a substrate that is inserted in the case and placed on upper surfaces of the plurality of protrusions.

Abstract: A headphone is configured to be used in combination with an in-ear earphone, and includes: an earmuff configured to be fitted over an auricle; an earmuff pickup arranged on an outer side of the earmuff and configured to collect an environmental sound; and a first speaker arranged on an inner side of the earmuff and configured to perform at least one of following actions: playing a noise-cancellation sound corresponding to the environmental sound collected by the earmuff pickup, or playing an audio. When the headphone is in use, the inner side of the earmuff and the auricle define an accommodating space for accommodating a part of the in-ear earphone exposed out of an external auditory canal. The headphone and the auricle define an accommodating space for accommodating the in-ear headphone.

Abstract: A method is disclosed, the method comprising obtaining at least one first information indicative of audio data gathered by at least one first microphone, and at least one second information indicative of audio data gathered by at least one second microphone; determining a differential information indicative of one or more differences between at least two pieces of information, wherein the differential information is determined based, at least in part, on the at least one first information and the at least one second information; and compensating of an impact onto the audio data, wherein audio data of the first information and/or the second information is compensated based, at least in part, on the determined differential information. Further, an apparatus, and a system are disclosed.

Abstract: The invention relates to a variable-directivity MEMS microphone. The microphone comprises an acoustic cavity. The following components are provided inside the acoustic cavity: a first acoustic transducer for detecting an acoustic signal and converting the acoustic signal into a first acoustic conversion signal; a first pre-amplifier, connected to the first acoustic transducer, and configured for outputting a first electric signal; a second acoustic transducer for detecting an acoustic signal and converting the acoustic signal into a second acoustic conversion signal; a second pre-amplifier, connected to the second acoustic transducer, and configured for outputting a second electric signal; and a signal processing chip, connected to the first pre-amplifier and the second pre-amplifier, and configured for generating a directional output signal by performing an arithmetic operation on the first electric signal and the second electric signal under the action of a switching control signal.

Abstract: Active noise cancellation systems, components, and methods are provided with single-source forward cancellation using a direction-dependent filter response.