Earhole-wearable sound collection device, signal processing device, and sound collection method

摘要

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 reduced noise influence, regardless of noise reduction methods such as the SS method.;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, so that emitted speech voice propagating through the ear canal of the wearer is collected. A noise cancelling unit that reduces noise propagating in the internal space having the microphone located therein is further provided to improve the S/N ratio of emitted speech voice collection signals. Further, an equalizing process for reducing the muffled sound generated when the emitted speech voice propagating through the ear canal is collected is performed on the sound collection signal from the microphone. In this manner, higher sound quality is achieved.

主权项

1. An earhole-wearable sound collection device comprising:
an attachment unit having at least a portion to be inserted into an earhole portion, the attachment unit forming a substantially sealed internal space therein when attached to the earhole portion, the internal space connecting to an ear canal; an internal microphone configured to collect emitted speech voice that is emitted by a wearer and propagates through the ear canal when the attachment unit is attached to the earhole portion, the internal microphone being located in the internal space of the attachment unit; an equalizing unit configured to perform an equalizing process of a high-frequency emphasizing type on a sound collection signal from the internal microphone; a speaker located in the internal space of the attachment unit; and a noise cancelling unit configured to cause the speaker to output noise cancelling sound based on a sound collection signal from a microphone provided for the attachment unit, the noise cancelling sound being output to reduce noise that propagates in the internal space of the attachment unit.