| 摘要 |
In a sound signal adjuster for use in telephone circuitry including a microphone capturing sound to produce a first sound signal and a loudspeaker, a second sound signal representative of a sound in a vicinity of the loudspeaker is obtained, and transitions are detected in the first and second sound signals to determine whether or not the sound in the vicinity of the loudspeaker is blocked. When the blocking is detected, a difference is calculated between a first frequency characteristic detected in response to the sound captured by the loudspeaker being determined as blocked and a second frequency characteristic detected in response to the sound captured by the loudspeaker not being determined as blocked. The difference calculated is used for suppressing a noise component included in the first sound signal.
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