Sound image localization control apparatus

摘要

An audio signal high frequency component controlled in terms of directivity is reproduced, or an audio signal high frequency component compensated in terms of frequency characteristic or controlled in terms of directivity is reproduced, such that the reflected sound comes from a direction in which the high frequency component is intended to be localized. The sound pressure in a seat where a desired localization effect is not provided due to the arrangement of speakers is compensated such that the interaural amplitude level in the seat is equal to that of another seat. Thus, an equivalent level of localization effect is provided in a plurality of seats, especially for an audio signal high frequency component, without significantly increasing the number of the speakers.

主权项

1. A sound image localization control apparatus to be provided in a vehicle, the sound image localization control apparatus comprising:
a first audio reproduction device configured to generate a first sound wave not having a directivity based on an audio signal; a second audio reproduction device configured to generate a second sound wave having a directivity by using a plurality of speaker units, based on the audio signal; and a directivity control device configured to process the audio signal to be input to the first and second audio reproduction devices, such that, an interaural amplitude level difference at a first listening position for a first listener is equal to an interaural amplitude level difference at a second listening position for a second listener, by causing the first listener at the first listening position to hear the first sound wave and by causing the second listener at the second listening position to hear a synthesized sound of the first sound wave and the second sound wave, wherein the directivity control device controls the directivity of the second sound wave such that the second sound wave generated by the second audio reproduction device is advanced toward an obstacle located to a side of the second listening position and is reflected by the obstacle so as to reach the second listening position.