JPH0410499U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a stereo reproduction device according to the present invention, and FIG.
and a block diagram showing an example of a second equalizer circuit, FIG. 3 is a transfer characteristic model diagram for theoretically explaining the stereo reproduction device of the present invention, and FIG. FIG. 2 is a block diagram showing another example of the equalizer circuit of FIG. 1, 9... High pass filter, 3, 11... Delay circuit, 5, 13... Amplifying circuit, 7, 15... First and second cancellation signal generation circuit, 17, 31...
...first and second adders, 19, 33...first
and a second equalizer circuit, 21, 35...L
and R speaker, 37...dummy head, 39
, 41...Left and right microphones.

Claims (1)

[Claims for Utility Model Registration] Regarding left and right channel speakers arranged symmetrically in front of a listening position, propagation of sound from these left or right channel speakers to the right or left listening point of the listening position. The difference between the time and the sound propagation time from the left or right channel speaker to the left or right listening point is T(
T>0), the degree of attenuation of the sound from the left or right channel speaker to the right or left listening point is a(
0<a≦1), the base of the natural logarithm is e, and the angular velocity is ω.A filter having a transfer characteristic H(ω), a delay circuit with a delay time T, and an amplifier circuit with the attenuation degree a are connected in series. A first cancellation signal creation circuit that creates a first cancellation signal from the left channel signal, a filter having a transfer characteristic H(ω), a delay circuit with a delay time T, and an amplifier circuit with the attenuation degree a are connected in series. a second cancellation signal creation circuit that creates a second cancellation signal from the right channel signal; a first adder that adds the left channel signal and the second cancellation signal; and the right channel signal. a second adder that adds the first cancellation signal; and a transfer characteristic 1 of the output signal from the first adder.
/[1-a ² {H(ω)} ² e ^-j2 ωT] and outputs the output signal from the second adder to the left channel speaker. Transfer characteristics 1
/[1-a ² {H(ω)} ² e ^−j2 ωT] and a second equalizer circuit that performs filter processing and outputs the resultant signal to the right channel speaker side. .