JPH02821U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention;
Fig. 2 is a circuit diagram showing the same specific example, Fig. 3 is a graph showing the level and frequency characteristics at each volume control angle, Fig. 4 is a schematic configuration diagram of another embodiment, and Figs. 5 and 6. is a schematic configuration diagram of a conventional example, and FIGS. 7 and 8 are graphs showing level and frequency characteristics in the conventional example. 1, 2, 3... Frequency characteristic setting circuit, 4, 5... Volume, 9... Intermediate tap, 10... Buffer circuit.

Claims (1)

[Claims for Utility Model Registration] (1) A first frequency characteristic setting circuit that sets one input end of the first volume so that an appropriate loudness curve is obtained when the volume is substantially controlled at its highest level. and the other input terminal is connected to the output terminal of the first volume, assuming that the level is lowered by the control amount of the second volume that is interlocked with the output terminal of the first volume when the volume is controlled at the substantially lowest level. A loudness control circuit, characterized in that the loudness control circuit is connected to a second frequency characteristic setting circuit that is set to provide an appropriate loudness curve. (2) Connect another frequency characteristic setting circuit corresponding to the intermediate tap of the first volume, and set the level in consideration of the level of the first volume at the intermediate tap and the level fluctuation due to the second volume. 2. The loudness control circuit according to claim 1, wherein the loudness control circuit is set to have an appropriate loudness curve.