Back to results
US 9,872,102 B2Granted
Microphone device and control method thereof
AssigneeHyundai Motor Company
InventorIlseon Yoo
Life of this patent
Estimating the term…
Abstract
A microphone device includes a case having a sound hole and a phase delay membrane. A plurality of non-directional microphones disposed in the case. A semiconductor chip is connected to the non-directional micro electro mechanical system (MEMS) microphones and operating in response to input signals, in which any one of the non-directional microphones forms a directional microphone by being connected with the sound hole and the phase delay membrane of the case.
Claims10
A microphone device comprising:
- a case having a sound hole and a phase delay membrane;
- a plurality of non-directional microphones disposed in the case;
- and
- a semiconductor chip connected to the plurality of non-directional microphones and operating in response to input signals,
- wherein any one of the non-directional microphones forms a directional microphone by connecting to the sound hole and the phase delay membrane of the case, the non-directional microphones include a first non-directional microphone and a second non-directional microphone, the second non-directional microphone forms a directional microphone by connecting to the sound hole and the phase delay membrane of the case, and
- the semiconductor chip
- measures a noise voltage from a sound voltage sensed by the first non-directional microphone, and determines whether the noise voltage is less than a reference voltage set in advance in the semiconductor chip when a sound processor starts to operate,
- operates the first non-directional microphone when the noise voltage is less than the reference voltage set in the semiconductor chip, and
- operates the second non-directional microphone as the directional microphone when the noise voltage is more than the reference voltage set in the semiconductor chip.
6 more elements
A method of controlling a microphone device, comprising steps of:
- operating a first non-directional microphone or a second non-directional microphone, when a sound processor starts to operate;
- transmitting a sound voltage generated by the first non-directional microphone to a semiconductor chip;
- measuring a noise voltage from a sound voltage input to the semiconductor chip, and comparing the noise voltage with a reference voltage set in advance in the semiconductor chip;
- operating the first non-directional microphone, when the noise voltage is less than the reference voltage;
- operating the second non-directional microphone as a directional microphone, when the noise voltage is more than the reference voltage, after the step of measuring and comparing;
- and
- stopping the operation of the sound processor.
4 more elements
Dependencies are inferred from the claim text.