发明名称 |
CIRCUIT ARRANGEMENT FOR CORRECTING FREQUENCY RESPONSE IN ACCORDANCE WITH FREQUENCY RESPONSE OF A SOUND FIELD |
摘要 |
In a circuit arrangement for automatically correcting frequency response so as to set a desired frequency response in view of a frequency response of a sound field, a frequency response control circuit is improved such that precise level control at a number of bands is effected with a simple structure. A microcomputer is used to determine the difference between a desired frequency response curve and a frequency response curve obtained by measuring the sound pressure level in a sound field, to which pink noise or the like is emitted through the frequency response control circuit, so as to produce a control signal used in the frequency response control circuit to give a desired frequency response to an audio signal. The frequency response control circuit comprises an amplifier, a plurality of resonance circuits corresponding to the bands, a plurality of variable resistor circuits each including a parallel circuit of a plurality of series circuits of a resistor and an analog switch; and an interface circuit responsive to serial data of the control signal from the microcomputer for controlling the analog switches. |
申请公布号 |
DE3461505(D1) |
申请公布日期 |
1987.01.15 |
申请号 |
DE19843461505 |
申请日期 |
1984.03.08 |
申请人 |
VICTOR COMPANY OF JAPAN, LIMITED |
发明人 |
OTSUKI, ZENJU;INAMI, MAMORU |
分类号 |
H03G5/16;H04R29/00;H04S7/00;(IPC1-7):H03G5/16 |
主分类号 |
H03G5/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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