In-vehicle audio device

摘要

In a structure of an in-vehicle audio device, the audio system has an audio signal supplying section, an audio signal processing section, a balance adjustment section and an audio signal output section. A right audio signal processing section and a left audio signal processing section in the audio signal processing section perform a process of filtering audio signals supplied from the audio signal supplying section on the basis of a transfer function. The transfer function contains a head related transfer function H(s), a space transmission compensation function G0(s)−1 and a vehicle height compensation function G1(s). The space transmission compensation function G0(s)−1 is an inverse function of a space transfer function G0(s). A filtering process for the audio signal is performed by using the transfer function to guide a driver's visual line to be decreased when a vehicle height is high, and increased when the vehicle height is low.

主权项

1. An in-vehicle audio device comprising:
an audio signal supplying device which supplies an audio signal; an audio signal processing device which performs a signal process of supplying a sound image corresponding to the audio signal transmitted from the audio signal supplying device, the audio signal processing device comprising: a space transfer characteristic compensation device which applies an inverse function of a transfer function to the audio signal transmitted from the audio signal supplying device, the transfer function expressing space transfer characteristics in a passenger compartment of a host vehicle to which the in-vehicle audio device is mounted; and a vehicle height characteristic compensation device which performs a filtering process of the audio signal supplied from the space transfer characteristic compensation device on a basis of the transfer function according to a vehicle height of the host vehicle, and an audio output device which outputs a sound to generate the sound image on the basis of the audio signal output from the audio signal processing device.