Provided is an electronic device. The electronic device includes a motor, a memory configured to store at least one of first frequency information associated with a sound that is generated when the motor is driven or second frequency information associated with a surrounding environment of the electronic device, and a processor configured to control the motor to be driven by avoiding a driving speed corresponding to the frequency information stored in the memory.

A microphone array is described for use in ultra-high acoustical noise environments. The microphone array includes two directional close-talk microphones. The two microphones are separated by a short distance so that one microphone picks up more speech than the other. The microphone array can be used along with an adaptive noise removal program to remove a significant portion of noise from a speech signal of interest.

A sound signal processing apparatus may include: a directional microphone configured to detect a user voice signal including a user's voice by arranging the directional microphone to face an utterance point of the user's voice; a non-directional microphone configured to detect a mixed sound signal comprising the user voice and an external sound; and a processor configured to generate an external sound signal by attenuating the user's voice from the mixed sound signal, by differentially calculating the user voice signal from the mixed sound signal.

An active noise cancelling system (20) comprising: an earphone (8′) comprising: an electro-acoustic driver (11); and at least one sensing microphone (12, 13); tunable active noise cancelling circuitry (7) operative to receive a signal from the at least one sensing microphone (12, 13), the tunable active noise cancelling circuitry (7) being pre-configured in a standard tuning for a reference ear and comprising at least one noise-control filter (14, 15); and a tuning module (24) operative to configure the earphone (8′) for an individual wearer by: comparing acoustic coupling of the earphone (8′) to the individual wearer's ear with acoustic coupling to the reference ear to determine a deviation in acoustic coupling; and using the determined deviation in acoustic coupling to modify the tunable active noise cancelling circuitry (7) by a predetermined degree based on the determined deviation in acoustic coupling.

A device for detecting sound in the surroundings of an automobile, including a first structure-borne noise sensor, which is acoustically coupled to a first oscillating body at an outside of the automobile and provides a first audio signal, including a second audio signal, which represents sound from an interior of the automobile, and including a processing unit, which is configured to subtract at least the second audio signal from the first audio signal.

An apparatus includes a CPU and a memory storing a program that causes the apparatus to function as the following units. A first amplification unit that amplifies a the sound signal from a first microphone for acquiring an environment sound, a second amplification unit that amplifies a sound signal from a second microphone for acquiring a noise of a noise source in accordance with a amplification amount, a conversion unit that performs Fourier transform on sound signals from the first amplification unit and the second amplification unit, a reduction unit that reduces noise from first sound data using noise data. The amplification amount is set based on at least one of a level of the sound signal from the second amplification unit and a type of the noise source.

A sound processing apparatus includes a first microphone that acquires an environmental sound, a second microphone that acquires noise from a noise source, a first conversion unit that performs Fourier transform on a sound signal from the first microphone to generate first sound data, a second conversion unit that performs Fourier transform on a sound signal from the second microphone to generate second sound data, a first reduction unit that reduces noise from the noise source in the first sound data using noise data, a detection unit detects, based on the second sound data, that short-term noise from the noise source is included in the first sound data, a second reduction unit that controls a magnitude of sound data from the first reduction unit and reduces the short-term noise, and a third conversion unit that performs inverse Fourier transform on sound data from the second reduction unit.

An electronic hearing protection device is provided. The electronic hearing protection device includes an amplifier and a speaker to relay sounds, such as conversations, to the user of the hearing protection. The hearing protection device provides adaptive gunshot recognition and suppression technology.

The present disclosure relates to an acoustic output device including an earphone core, a controller, a Bluetooth module, and a button module. The earphone core may include at least one low-frequency acoustic driver configured to output sounds from at least two first guiding holes and at least one high-frequency acoustic driver configured to output sounds from at least two second guiding holes. The controller may be configured to direct the at least one low-frequency acoustic driver to output the sounds in a first frequency range and direct the at least one high-frequency acoustic driver to output the sounds in a second frequency range. The Bluetooth module may be configured to connect the acoustic output device with at least one terminal device. The button module may be configured to implement an interaction between a user of the acoustic output device and the acoustic output device.

The present disclosure provides a microphone apparatus. The microphone apparatus may include a microphone and a vibration sensor. The microphone may be configured to receive a first signal including a voice signal and a first vibration signal. The vibration sensor may be configured to receive a second vibration signal. And the microphone and the vibration sensor are configured such that the first vibration signal may be offset with the second vibration signal.