JPH048342Y2 - - Google Patents

Description

[Detailed explanation of the idea] Technical field The present invention relates to an automatic sound level adjustment device.

BACKGROUND ART Conventionally, when sound from a stereo, piano, karaoke, etc. is played indoors, the only way to detect how much of this sound is leaking outside is to place a sound level meter outside the room and measure it. Conventional sound level meters do not have a warning function when the sound leaking outside exceeds a standard value, making it impossible to confirm this inside the room.

Purpose The purpose of this invention is to determine whether the sound pressure level of sound leaking from an indoor sound source through walls to the outside exceeds a standard value, depending on the noise level of the external space outside the room. It is an object of the present invention to provide an automatic sound level adjustment device that can perform sound level adjustment.

Composition of the invention The invention includes a first detection means for detecting the sound pressure level of sound leaking from a sound source in the room to the outside through the wall;
a second detection means for detecting the sound pressure level of the indoor space and the external space separated through the wall; a reference level setting means for setting a reference level; an output level of the first detection means; a comparison means for comparing the output level of the means and the reference level;
warning means driven by the output signal of the comparison means, and the comparison means, by the comparison operation,
When it is detected that the output level of the first detection means is higher than the output level of the second detection means and the output level of the first detection means is higher than the reference level, an output is output to the warning means. The present invention provides an automatic sound level adjustment device characterized in that it transmits a signal to drive the warning means.

Embodiment FIG. 1 is a block diagram of an automatic sound level adjusting device according to an embodiment of the present invention, and FIG. 2 is a diagram for explaining the operation of the automatic sound level adjusting device according to an embodiment of the present invention. FIG. 1 will be explained below with reference to FIG. 2.

The sound pressure level H1 of sounds such as stereo, piano, and karaoke generated in the room passes through wall 1 and
As shown in the figure, the sound is received by a microphone 2 installed toward the room, and is converted into an electrical signal. A signal indicating the sound pressure level H1 of indoor noise detected by the microphone 2 is amplified by the amplifier circuit 3. The amplifier circuit 4 amplifies only the positive half cycle of the signal amplified by the amplifier circuit 3. The signal amplified by the amplifier circuit 4 is converted by the capacitor 5 into a DC signal voltage _VE .
The DC signal voltage V _E is input to the noise device 17 .
The noise device 17 outputs an output corresponding to the sound pressure level detected by the microphone 2. The display means 18 performs a display corresponding to the sound pressure level H1 detected by the microphone 2. Further, the DC signal voltage V _E is input to a comparator circuit 6.

The sound pressure level H2 of external sounds such as car noise and construction sounds is received by the microphone 7 and converted into an electrical signal. The microphone 7 is mounted toward the outside of the room, as shown in FIG. A signal indicating the sound pressure level H2 of the outdoor sound detected by the microphone 7 is amplified by the amplifier circuit 8. The amplifier circuit 9 amplifies only the positive half cycle of the signal amplified by the amplifier circuit 8. The capacitor 10 converts the signal amplified by the amplifier circuit 9 into a DC signal voltage _VD . The DC signal voltage V _D is input to the anode of the diode 11 via the line l1. The signal voltage V _D output from the cathode side of the diode 11 is input to the above-mentioned comparator circuit 6 via lines 12 and 13. Diode 11 is used to prevent reverse current flow.

The variable resistor 12 sets a reference signal voltage V _REF indicating a reference level. Set reference signal voltage V _REF
is inputted to the comparator circuit 6 via the line l4 and the aforementioned line l3. Comparison circuit 6 uses DC signal voltage V _E , DC signal voltage V _D and reference signal voltage V _REF
It outputs to the acoustic drive means 13 and the switching circuit 14 in response to the output. Acoustic drive means 13
is a sound generating means 15 realized by a speaker or the like.
Activate. The switching circuit 14 activates display means 16 realized by a light emitting diode or the like.

FIG. 3 is a flowchart for explaining the operation of an automatic sound level adjustment device according to an embodiment of the present invention. In step n1, the sound pressure level H1 is input through the microphone 2, and in step n2, the sound pressure level H1 is converted into a signal voltage _VE .
In step n3, the sound pressure level H2 is input through the microphone 7, and in step n4, the sound pressure level H2 is converted into a signal voltage _VD . step n
5, the reference signal voltage V _REF set by the variable resistor 12 and the signal voltage V _D are compared. When the reference signal voltage V _REF is greater than or equal to the signal voltage V _D , the process moves to step n6. In step n6, the reference signal voltage V _REF and the signal voltage _VE are compared, and when the signal voltage _VE exceeds the reference signal voltage V _REF , a warning is generated in step n7. step n
6, the magnitude of the reference signal voltage V _REF is the signal voltage
When the size is greater than or equal to _VE , the process ends without generating a warning.

When the reference signal voltage V _REF is smaller than the signal voltage V _D in step n5, the process moves to step n8. In step n8, the signal voltage V _D and the signal voltage V _E
Compare. When the signal voltage V _E exceeds the signal voltage V _D , a warning is generated in step n9. step n
In step 8, when the signal voltage V _D is greater than or equal to the signal voltage V _E , the process is terminated without generating a warning.

In other words, when the sound pressure level of the sound leaking from the indoor sound source to the outside is higher than the sound pressure level of the outside space, and the sound pressure level of the sound leaking to the outside is higher than the set standard level, a warning is issued. Because it is configured to emit. Once the reference level is set,
Noise leaking from indoors to outdoors can be automatically and effectively detected depending on the level of noise in external space.

For example, even if the sound pressure level of the sound leaking from the indoor sound source to the outside exceeds the standard level, if the sound pressure level is lower than the sound pressure level of the outside space, a warning will not be issued. It is possible to automatically detect sounds leaking to the outside depending on the size of the noise.

The display means 18 is realized by a light emitting diode or the like, but may have another structure. Sound generating means 13
is realized by a speaker, a piezoelectric buzzer, etc., but other configurations may also be used. The display means 16 is realized by a light emitting diode or the like, but may have another structure. In the above embodiment, indoor and outdoor cases were described;
It can also be in other places, such as one room and another room, or one house and another house.

Effects As described above, according to the present invention, the sound pressure level of the sound leaking from the indoor sound source to the outside is higher than the sound pressure level of the outside space, and the sound pressure level of the sound leaking to the outside is set The system is configured to issue a warning when the level exceeds the standard level, so once the standard level is set, the system automatically detects noise leaking from indoors to outdoors, depending on the level of noise in the outside space. , and can be done effectively.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an automatic sound level adjustment device according to an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation of an automatic sound level adjustment device according to an embodiment of the present invention, and FIG. It is a flowchart for explaining the operation of the automatic sound level adjustment device according to one embodiment of the invention. 2, 7...Microphone, 6...Comparison circuit, 1
2... Variable resistor, 13... Acoustic driving means, 14
... Switching circuit, 15, 16 ... Display means.

Claims (1)

[Claims for Utility Model Registration] A first detection means for detecting the sound pressure level of sound leaking from a sound source in the room to the outside through the wall; a second detection means for detecting; a reference level setting means for setting a reference level; a comparison means for comparing the output level of the first detection means, the output level of the second detection means, and the reference level; a warning means driven by an output signal of the comparison means, wherein the comparison means is activated by the first
Sending an output signal to the warning means when it is detected that the output level of the detection means is higher than the output level of the second detection means and the output level of the first detection means is higher than the reference level. An automatic sound level adjustment device, characterized in that the automatic sound level adjustment device drives the warning means.