JP2563086Y2 - Speaker device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a speaker device, and more specifically, an AV (Audio Visual) theater show, SR (Sound Reinforcement), PA (Public Addr).
ess), improvement of speaker arrangement in speaker systems such as theater stages and exhibitions.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional speaker device, for example, a speaker device in a show stage, as is well known. In FIG. 1, speaker units 11L and 11R each including a tweeter SH, a squawker SM, and a woofer SL are arranged on the left and right on the stage 10, respectively. These speakers SH, SM,
The audio signals in the high, middle, and low frequency bands are amplified by the power amplifier PA and supplied to the SL.
It should be noted that there are many customer seats 12 in front of the stage 10.

[0003]

However, such a conventional technique has the following disadvantages. (1) The bass reproduced and output by the woofer SL disposed on the stage 10 propagates omnidirectionally, and howling may occur due to low-frequency feedback to the microphone 14 used in the stage 10. In order to remedy such inconveniences, the woofer SL was placed on stage 1
If it is moved to the rear of 0, the distance to the listener 16 becomes longer and the surroundings (walls, ceilings, etc.) are affected, and bass sounds are muffled and resonance sounds are easily added, resulting in deterioration of sound quality. I will.

[0004] (2) In order for the bass output from the woofer SL to be audible to the listener 16 of the passenger seat 12 far from the stage 10, a high-output power amplifier PA is required. In order to remedy such inconvenience, for example, a method of separating and moving the woofer SL close to the listener 16 can be considered, but this time, the sound image localization of the bass part is blurred.

The present invention focuses on these points.
It is an object of the present invention to provide a speaker device capable of effectively preventing bass movement or howling of a sound image localization or an adverse effect due to a surrounding environment without using a high-output power amplifier and capable of reproducing bass sound satisfactorily. And

[0006]

In order to achieve the above object, the present invention provides a speaker device in which signals are separated and reproduced for each frequency band by a bass speaker and another speaker. And a delay means for delaying a signal supplied to the bass speaker in accordance with a distance difference between the bass speaker and another speaker as viewed from the listener. And

[0007]

The present invention makes use of the Haas effect (preceding effect) in which the sound image localization changes when a time difference is given by a delay means between signals supplied to speakers arranged at a distance. FIG. 4 shows this state. As shown in FIG. 3A, when the same sound is output from the left and right speakers SPL and SPR at the same time, the listener 16 located at the same distance from the speakers SPL can hear the sound from the center of the speakers SPL and SPR.

On the other hand, as shown in FIG. 1B, when a delay circuit 18 is inserted on the speaker SPR side to delay the signal on the right side, sound can be heard from the speaker SPL. , The sound image localization moves in the direction of arrow F. Generally, the delay time is several tens
The movement of the localization can be felt from about S, and several mS
With it, it becomes completely localized on one side. Also, at most Equation 1
It is said that about 0 mS is the limit at which a good effect can be obtained.

According to the present invention, the bass speaker is arranged close to the listener. Then, a delay corresponding to the distance between the bass speaker and another speaker is given to the signal supplied to the bass speaker. As a result, the sound image localization of the reproduced sound from the low-pitched loudspeaker matches the other loudspeakers due to the Haas effect.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a speaker device according to an embodiment of the present invention. Note that the same reference numerals are used for the same components as those of the above-described related art or components corresponding to the related art.

FIG. 1 shows a speaker device according to this embodiment. In FIG.
Speaker units 20R and 20L each including a tweeter SH and a squawker SM are arranged. On the side near the seat 12, a number of woofers SLA to SLN are arranged symmetrically at appropriate intervals. Since the present embodiment is symmetrical in this way,
In the following description, the left part will be described.

Among the above-mentioned components, the distance between the speaker unit 20L on the stage 10 and the listener 16A is d _A1 ,
The distance between the woofer SLA and the listener 16A is d _A2 . The distance between the speaker unit 20L on the stage 10 and the listener 16B is d _B1 , and the woofer SLB and the listener 1
The distance between the 6B has a d _B2. Similarly, the distance between the speaker unit 20L on the stage 10 and the listener 16N is d _N1 , and the distance between the woofer SLN and the listener 16N is d _N
N2 .

FIG. 2 shows a circuit configuration of the embodiment. In the figure, an audio signal input terminal 22 is connected on one side to the input side of power amplifiers 24 and 26, and its output side includes a tweeter SH and a squawker S.
M are connected to each other. On the other hand, the input terminal 22 is connected to the input side of a low-pass filter (LPF) 28 for extracting a low frequency range in the audio signal.
The output side of F28 is connected to the input side of each of the delay circuits 30A to 30N. And these delay circuits 3
Power amplifiers 32A to 3N are provided on the output sides of 0A to 30N.
The above-mentioned woofers SLA to SLN are connected to each other via 2N. These delay circuits 30A to 30N
Is set in accordance with the distance difference between the speaker units 20L and the woofers SLA to SLN in the listeners 16A to 16N.

In the above embodiment, the woofers SLA to
The SLN is connected to the delay circuits 30A to 30N by a long speaker cable, and the LPF 28 and the delay circuits 30A to 30N are arranged at different locations from the woofers SLA to SLN. However, as shown in FIG.
As in the configuration example of the bass speaker system SU including LA to SLN, they may be integrally configured.

In the figure, a bass speaker system SU
Are provided with a volume knob 34 for adjusting the output level, a knob 36 for adjusting the reproduction frequency band, and a knob 38 for setting the arrangement position. Of these, knob 3
6 relates to the characteristic setting of the LPF 28 in FIG.
The pass frequency band of the LPF 28 is set in accordance with the frequency set by the knob 36. The knob 38 relates to the setting of the characteristics of the delay circuit 30 shown in FIG. 2, and the signal delay amount of the delay circuit 30 is set in accordance with the set distance of the knob 38.

Next, the operation of this embodiment will be described.
First, in the woofer SLA, for example, the sound image localization of the low sound as viewed from the listener 16A is the tweeter SH on the stage 10,
The signal delay amount by the delay circuit 30A is set so as to coincide with the squawker SM. That is, the woofer SLA
Difference ΔL _A = d _A1 between the distance and tweeter SH, squawker SM
The phase difference of the sound caused by -d _A2 is the delay circuit 30A.
The stage 10 is corrected by the Haas effect described above.
The sound is localized on the bass at the top. At this time, the signal delay amount ΔT _A in the delay circuit 30A is as follows: ΔT _A = 3 · ΔL _A + 15 = 3 · (d _A1 −d _A2 ) +15 (1) The unit of [Delta] T _A When m units of [Delta] L _A becomes mS.

Similarly, for the i-th woofer SLi, ΔT _i = 3 · ΔL _i +15 = 3 · (d _i1 −d _i2 ) +15 (2) . The characteristics of the delay circuits 30A to 30N are set so that the signal delay amount calculated in this manner is obtained. In the example of FIG. 3, such a signal delay is provided by setting the knob 38 of the bass speaker system SU to a value corresponding to the installation position.

Therefore, when viewed from the listener 16A of the seat 12, the sound output from the woofer SLA is felt by the Haas effect as if it were heard from above the stage 10. The same applies to the listeners 16B to 16N. In general, it is said that low-frequency sounds of 300 Hz or less have no directivity in terms of hearing. When the woofers SLA to SLN are separated from the tweeter SH and the squawker SM to the listening position and reproduced, the sound image is blurred. The connection between the speakers is distorted in the sense of hearing. However, in this embodiment, since the sound image localization is moved by the Haas effect by performing the signal delay by the delay circuits 30A to 30N, such an inconvenience does not occur.

If, for example, d _N1 / d _N2 = 2, the sound pressure increases by +6 dB at the position of the listener 16N, and becomes four times the power conversion ratio. Therefore, the sound having the same volume as when the woofer SLN is installed on the stage 10 is reduced by 1 /.
4 power. Further, according to the present embodiment, the microphone 14 on the stage 10 and the woofer S
Since LA to SLN are separated from each other, howling can be prevented well. For example, assuming that the distance between the woofer and the microphone 14 has doubled, the sound pressure of the bass sound at the position of the microphone 14 is -6 dB. That is, the howling margin increases by 6 dB.

In addition, in this embodiment, the woofers SLA to SL
Since N is installed near the listener, it is less susceptible to the surrounding environment such as a ceiling or a wall, and a clear low-pitched sound can be obtained.

The present invention is not limited to the above embodiment, but includes, for example, the following. (1) The above embodiment is an example in which the present invention is applied to a relatively large sound system such as a concert hall, but is similarly applicable to a relatively small sound system as shown in FIG. In this embodiment, bass reproduction on the television 40 is reproduced by the woofers SLL and SLR disposed closer to the listener 16 than the television 40. The bass reproduced by these components has a required signal delay. Thus, the sound image localization of the low sound is determined by the Haas effect at the positions of the speakers SL and SR on the television 40 side, and the same effect as that of the above embodiment can be obtained. In addition, the present invention is similarly applicable to audio devices and the like. (2) In the above embodiment, a plurality of woofers are arranged, but of course one may be provided. Further, the present invention can be applied to both monaural reproduction and stereo reproduction.

[0022]

As described above, according to the speaker device of the present invention, since the woofer is arranged on the listener side and the signal is delayed, sound image localization can be secured by the Haas effect, and howling and surrounding environment can be secured. There is an effect that bass reproduction can be favorably performed without being affected by the sound.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a speaker device according to the present invention.

FIG. 2 is a circuit diagram showing a connection configuration of the embodiment.

FIG. 3 is an explanatory view showing an application example of the speaker device according to the present invention.

FIG. 4 is an explanatory diagram showing the Haas effect.

FIG. 5 is an explanatory view showing another embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an example of a conventional speaker device.

[Explanation of symbols]

10 stage, 11L, 11R, 20L, 20R speaker unit, 12 seat, 14 microphone, 1
6, 16A-16N ... listener, 18, 30A-30N ...
Delay circuit (delay means), 22 input terminals, 24, 2
6, 32A to 32N, PA: power amplifier, 34, 3
6, 38 knob, 40 television, SH tweeter, SL, SR, SPL, SPR, speaker, SLA
~ SLN, SLL, SLR: woofer (low-pitched speaker), SM: squawker, SU: low-pitched speaker system.

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-256300 (JP, A) JP-A-3-49400 (JP, A) JP-A-2-13097 (JP, A) JP-A-3-256 157099 (JP, A) JP-A-61-29300 (JP, A) JP-A-4-294638 (JP, A) JP-A-6-1771092 (JP, U) JP-A-2-30699 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A speaker device in which a signal is separated and reproduced for each frequency band by a bass speaker and another speaker, wherein the bass speaker is arranged close to a listener side and a bass sound when viewed from the listener. And a delay unit for delaying a signal supplied to the low-pitched speaker in accordance with a distance difference between the other speaker and the other speaker.