| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal processor for sealed headphone capable of making it easy to hear a sound of a sound source and also an ambient sound without overlapping the sound of the sound source with the ambient sound.SOLUTION: A filter 131 L applies a HRTF of a route from a virtual speaker SPV at the back of a listener to the left ear to a sound pick-up signal. Similarly, a filter 131 R applies the HRTF of the route from the virtual speaker SPV at the back of the listener to the right ear to the sound pick-up signal. An L channel audio signal and an R channel audio signal input from a level adjuster 14L and a level adjuster 14R are mixed with the sound pick-up signal of a microphone 11. Since the sound pick-up signal of the microphone 11 is subjected to processing of being localized at a position of the virtual speaker SPV at the back of the listener, a user has an audio sound localized inside a head, and has an ambient sound localized at the back position. Consequently, the user can hear a sound suddenly generated (for example, a sound of an emergency vehicle) from the back position while listening to the audio sound. |
