Example embodiments may include one or more of receiving an electrical sound emission signal from a sound controller, interrupting reception of the electrical sound emission signal, by a sound emission interruption circuit connected to a sound emitter, and receiving an electrical ambient sound signal via a sound detection circuit, based on ambient sound sensed by the sound emitter when the reception of the electrical sound emission signal is interrupted by the sound emission interruption circuit.

Embodiments of the present invention provide a vehicle privacy system (700), comprising audio input means (130, 190, 720) for receiving an external audio signal (725) indicative of audio from within a vehicle (900), audio source means (710, 910) for receiving the external audio signal (725) and determining an output audio signal (735) based thereon for reducing an external intelligibility of speech within the vehicle (900), and audio output means (145, 146, 147, 730, 920) for receiving the output audio signal (735) and outputting audio (925) corresponding thereto to be at least partly audible external to the vehicle (900).

A sound attenuation arrangement for an inverter cover of an electric compressor, which is characterised in that in addition to fasteners for the inverter cover on the compressor housing of the electric compressor, a sound attenuation means for reducing noise emission via the inverter cover is provided, where the sound attenuation means is made up of a screw with a screw head and a screw shaft, and in that on the screw head a damping element is arranged, where the screw is in contact via the screw shaft with the compressor body, and via the damping element arranged on the screw head with the inverter cover, in a manner that absorbs vibrations.

A sound attenuation arrangement for an inverter cover of an electric compressor, which is characterised in that in addition to fasteners for the inverter cover on the compressor housing of the electric compressor, a sound attenuation means for reducing noise emission via the inverter cover is provided, where the sound attenuation means is made up of a screw with a screw head and a screw shaft, and in that on the screw head a damping element is arranged, where the screw is in contact via the screw shaft with the compressor body, and via the damping element arranged on the screw head with the inverter cover, in a manner that absorbs vibrations.

A whistling sound suppression method includes: obtaining an ambient audio signal, the ambient audio signal being a sound signal in a surrounding environment of an earphone; filtering the ambient audio signal according to a preset first filter group to obtain a first audio signal; obtaining an ear canal audio signal, the ear canal audio signal being a sound signal when the first audio signal propagates in an ear canal; and filtering a subsequently obtained ambient audio signal according to a preset second filter group to obtain a second audio signal in response to the ear canal audio signal meets a whistling condition.

A whistling sound suppression method includes: obtaining an ambient audio signal, the ambient audio signal being a sound signal in a surrounding environment of an earphone; filtering the ambient audio signal according to a preset first filter group to obtain a first audio signal; obtaining an ear canal audio signal, the ear canal audio signal being a sound signal when the first audio signal propagates in an ear canal; and filtering a subsequently obtained ambient audio signal according to a preset second filter group to obtain a second audio signal in response to the ear canal audio signal meets a whistling condition.

A sound absorbing structure includes a wall having a first side and a second side and at least one acoustic scatterer coupled to a first side of the wall. The first side of the wall may be positioned to face a source of noise, such as moving motor vehicles, airplanes, and the like. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end with the channel open end being in fluid communication with the opening.

A voice sound reduction device having a sound dampening cup that conforms to a user's face around the user's mouth, a microphone on an interior of the sound dampening cup electronically paired to a communication device, and a means for positioning the sound dampening cup to a user's face.

A voice sound reduction device having a sound dampening cup that conforms to a user's face around the user's mouth, a microphone on an interior of the sound dampening cup electronically paired to a communication device, and a means for positioning the sound dampening cup to a user's face.

Methods for providing a customized audio experience to a user of an audio output device are provided. A user interface is provided on a user device communicatively coupled to the audio output device, the user interface capable of accepting user input for managing the audio experience for the user. A set of activities is provided via the user interface, wherein each activity in the set invokes a set of behaviors configured for the activity for providing the customized audio experience to the user, wherein each behavior in the set customizes the audio experience for the user. A capability is provided via the user interface for the user to launch an activity from the set for invoking the set of behaviors configured for the activity to receive the customized audio experience.