Patent ID: 9237392
Filing Date: 2016-01-12
CPC Classification: G10L,H04R

Claim Text:
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 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; any of a low-frequency extraction filter unit configured to perform a filtering process on a sound collection signal from the internal microphone, to extract a low-frequency component, an equalizing unit configured to perform an equalizing process of a high-frequency emphasizing type on the sound collection signal from the internal microphone; and a control unit configured to control switching of the filter processing characteristics of the low-frequency extraction filter unit in accordance with a result of a noise analysis conducted based on a sound collection signal of extraneous noise; wherein the control unit detects a speech voice non-emitted period during which a level of the sound collection signal of extraneous noise is equal to or lower than a predetermined level, and performs the noise analysis based on the sound collection signal in the speech voice non-emitted period.