JP2002252899A - Sound regenerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker to be used in a slot machine which can regenerate sound with presence and with no lateral expansion. SOLUTION: A sound regenerator comprises a signal processing circuit, which pseudo-expands regenerated sound by receiving two-channel signals and then processing them, and at least two speakers which are connected to the signal processing circuit and are arranged vertically for a listener.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a sound reproducing apparatus.

[0002]

2. Description of the Related Art A conventional stereo speaker device has an L
The stereo image is reproduced by two speakers for the channel and the R channel. In this case, the two speakers are arranged at the same height, the speaker for the L channel is on the left side of the listener, and the speaker for the R channel is on the right side of the listener. Placed in

[0003]

In a slot machine or a pachinko machine, a speaker is mounted on the slot machine to enhance a sense of reality, and various BGMs and sound effects at the time of a big hit are reproduced at a relatively high volume. In this case, in order to further enhance the sense of reality, two speakers are provided on the left and right, and the reproduced sound is reproduced in stereo. However, since the interval between adjacent seats is narrow, if the reproduced sound from the slot machine at the adjacent seat is heard, the player cannot concentrate on the game. Therefore, if speakers are arranged on the left and right to expand the sound field to the left and right in order to obtain a more realistic sound effect, there is a contradictory problem that the sound reproduced from the slot machine at the next seat becomes an obstacle.

[0004]

According to the present invention, there is provided a signal processing circuit for pseudo-expanding the spread of reproduced sound by inputting a two-channel signal and performing signal processing. , And at least two speakers connected to the signal processing circuit and arranged vertically to the listener.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is an external view in which the device of the present invention is applied to a slot machine 1. The slot machine 1 inserts a special coin into the coin slot 2 and then presses the drum rotation switch 3 to display three rotating drums in which the number "7", a spade, a heart, and other patterns are arranged in the rotating direction. 4 to 6 start rotation.
The player presses the stop switches 7 to 9 provided for the rotating drums 4 to 6, respectively, to stop the rotating drums 4 to 6.

In the case where the numbers and patterns indicated by the stopped rotating drums 4 to 6 are in a predetermined arrangement, a “hit” occurs, and coins several to tens of times the number of coins inserted according to the arrangement are obtained. The coin exits from the coin outlet 10 and accumulates on the coin tray 11. In addition, various characters are displayed on the display unit 12, and the illumination units 13 and 14 blink, thereby exciting the player.

The three loudspeakers 21 to 23 are arranged in the vertical direction, and have a special effect when a coin is inserted into the coin insertion slot 2 or when the stop switches 7 to 9 are pressed, not to mention “hit”. Play the sound. By arranging in the vertical direction, the sound image does not spread horizontally. Therefore, even when the slot machines 1 are arranged adjacent to each other, the reproduced sound of the adjacent slot machine is relatively unnoticeable. On the other hand, since the speakers 21 to 23 are arranged adjacently, only a reproduced sound without a sense of reality can be obtained as it is. Therefore, in the present embodiment, after the two-channel input signal is processed, the L-channel speaker 21, the center speaker 22, the R-channel speaker 23, and the subwoofer 24 arranged inside the slot machine 1 are processed. Output to

FIG. 2 is a block diagram of the signal processing circuit. The signal of the L channel is input to the L-in terminal 31, and the signal of the R channel is input to the R-in terminal 32. This 2
The two signals are added by an adder circuit 34, amplified by an amplifier 53 via a low-pass filter (hereinafter referred to as LPF) 34, and then reproduced by the subwoofer 24. The L-channel signal input to the L-in terminal 31 is a high-pass filter (hereinafter, referred to as HPF).
Phaser 37 and LPF for phase shift through 35
38. Similarly, the R-channel signal input to the R-in terminal 32 is a high-pass filter (hereinafter, HP
Phaser 39 for phase shifting through 36
And LPF40.

The signal obtained by subtracting the signal of the LPF 40 from the output of the phase shifter 37 by a subtraction circuit 41 is amplified by an amplifier 51, and then output to a speaker 21. Similarly, a signal obtained by subtracting the signal of the LPF 38 from the output of the phase shifter 39 by the subtraction circuit 42 becomes an amplifier 54.
After being amplified by the speaker 23, the signal is output to the speaker 23.

The outputs of the LPFs 38 and 40 are added by an adder circuit 43, the phase of which is shifted by a phase shifter 44, amplified by an amplifier 52, and amplified by a speaker 2.
2 is output.

Accordingly, the subwoofer 24 is supplied with an addition signal of the low-frequency signals of the L channel and the R channel which have not undergone the phase processing. Also, the center speaker 22
, A sum signal of the middle-range signals of the L channel and the R channel is input after the phase shift. The L-channel speaker 21 outputs a signal obtained by subtracting the middle-range component of the R-channel after applying a phase shift to the signal of the middle-range or more of the L-channel. Similarly, the R-channel speaker 23 outputs a signal obtained by subtracting the middle-range component of the L-channel after applying a phase shift to the signal in the middle range of the R-channel.

By the above processing, the speakers 21 to 23
, A sufficiently wide realistic feeling can be obtained. Also,
Since the arrangement of the speakers 21 to 23 is vertical,
Even if the slot machines 1 are closely arranged in the horizontal direction, the reproduced sound from the adjacent slot machine 1 spreads in the vertical direction, so that the reproduced sound from the adjacent slot machine 1 is relatively unnoticeable.

The present invention can be applied not only to a slot machine but also to various other adjacent modes. For example, the present invention is effective as long as it is disposed adjacent to the horizontal direction, such as a pachinko machine or a game machine. Further, a circuit for expanding the sound field space is not limited to the above-described embodiment, and a known circuit technology can be used.

[0014]

As described above, according to the present invention, since the speakers are arranged vertically, it is possible to obtain a sufficiently wide sound field space while reducing the spread of sound in the horizontal direction, and to reduce the size of the speaker device. It can contribute to the conversion.

[Brief description of the drawings]

FIG. 1 is a front view of a slot machine 1. FIG.

FIG. 2 is a circuit block diagram.

[Explanation of symbols]

 1 slot machine 21-23 speaker 24 subwoofer

Claims (2)

[Claims] 1. A sound reproducing apparatus for reproducing at least two-channel signals, a signal processing circuit for pseudo-expanding the spread of reproduced sound by inputting two-channel signals and performing signal processing; A sound reproducing apparatus comprising at least two speakers connected to a signal processing circuit and arranged in a vertical direction for a listener. 2. The speaker according to claim 1, wherein the speaker is an L-channel speaker,
An R channel speaker, a center channel speaker and a subwoofer, and the signal processing circuit
A signal obtained by subtracting the R-channel signal from the L-channel signal is output to the channel speaker, and an L-signal is output from the R-channel signal to the R-channel speaker.
A signal obtained by subtracting the channel signal is output, a mid-range signal obtained by adding the L channel signal and the R channel signal to the center channel speaker, and an L channel signal and an R channel signal are output to the subwoofer. 2. The sound reproducing apparatus according to claim 1, wherein a low-frequency signal obtained by adding the signals is output.