US Patent Application 18446275. EARHOLE-WEARABLE SOUND COLLECTION DEVICE, SIGNAL PROCESSING DEVICE, AND SOUND COLLECTION METHOD simplified abstract

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EARHOLE-WEARABLE SOUND COLLECTION DEVICE, SIGNAL PROCESSING DEVICE, AND SOUND COLLECTION METHOD

Organization Name

Sony Group Corporation

Inventor(s)

KOHEI Asada of KANAGAWA (JP)

SHINPEI Tsuchiya of TOKYO (JP)

DAIZEN Kobayashi of TOKYO (JP)

KOJI Nageno of KANAGAWA (JP)

EARHOLE-WEARABLE SOUND COLLECTION DEVICE, SIGNAL PROCESSING DEVICE, AND SOUND COLLECTION METHOD - A simplified explanation of the abstract

This abstract first appeared for US patent application 18446275 titled 'EARHOLE-WEARABLE SOUND COLLECTION DEVICE, SIGNAL PROCESSING DEVICE, AND SOUND COLLECTION METHOD

Simplified Explanation

The present technique is about a device and method for collecting sound with high signal-to-noise ratio (S/N ratio) by reducing noise influence without using noise reduction process.

  • The device is an earhole-wearable sound collection device.
  • It includes a microphone placed in a sealed space that connects to the wearer's ear canal.
  • The microphone collects emitted speech voice that travels through the ear canal.
  • The collected sound signal has a dominant emitted speech voice component, especially at low frequencies.
  • The S/N ratio of the collected sound signal can be improved by extracting the low-frequency component using a low-pass filter (LPF).
  • Alternatively, an equalizing process can be applied to reduce muffled sound caused by collecting sound through the ear canal.
  • These techniques result in higher sound quality in the collected sound signal.


Original Abstract Submitted

The present technique relates to an earhole-wearable sound collection device, a signal processing device, and a sound collection method for realizing sound collection at a high S/N ratio, with noise influence being reduced not by a noise reduction process. In the earhole-wearable sound collection device, a microphone that collects emitted speech voice is provided in a space that is substantially sealed off from outside and connects to an ear canal of the wearer (the speaker). With the microphone being located in the space sealed off from outside, emitted speech voice that propagates through the ear canal of the wearer is collected. In a sound collection signal obtained through the ear canal, the emitted speech voice component is dominant over the noise component particularly at low frequencies. Therefore, the S/N ratio of an emitted speech voice collection signal can be improved by extracting the low-frequency component of the sound collection signal with the use of a LPF, for example. Alternatively, an equalizing process for reducing muffled sound that is generated when sound is collected through the ear canal is performed on the sound collection signal. As a result, higher sound quality can be achieved.

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