JPH0421320B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] Since the lighting of a lamp can be controlled by sound waves,
Lighting of lamps can be controlled by voice or a commercially available dog whistle in hallways, bedrooms, etc. at night. Therefore, human daily life activities can be made easier.

[Conventional technology]

For example, by the same inventor (designer)
No. 50637, Utility Model Application No. 60-64599 and U.S. Patent No.
There is number 4433362.

[Problem to be solved by the present invention]

First, the configuration of the control circuit is difficult to convert into an IC, so
It has the disadvantage that it is large and expensive and cannot be mass-produced.

Second, there is a problem in that the lamp lights up even when there is a slight impact sound, such as the sound of metal touching or the sound made when plastic film is folded.

Thirdly, the conventional technology extracts only sound waves in a specific frequency range, that is, 5KC to 8KC, using an analog filter circuit, but since it needs to be constructed in a small and inexpensive manner, sound waves with frequencies other than those mentioned above may be mixed in. There are problems that cause malfunctions.

[Means to solve problems]

The first means includes a microphone that receives sound waves input from a sound source, a waveform shaping circuit that amplifies the output, single-wave rectifies it, and shapes it into a rectangular wave signal train, and an oscillation circuit that oscillates and outputs a clock pulse; A first counting circuit 10 that sequentially counts clock pulses within an interval corresponding to the width of the rectangular wave signal, and a count value of the counting circuit is between a first set value and a second set value. A low level output is obtained by inputting the count output only when it corresponds to the sound wave frequency of 5KC to 8KC, and when the count value is smaller than the first set value or larger than the second set value. In the case of counting output, the first electric circuit that provides a high level output and the clock pulses described above are counted and set for a set time (about 1 second or more).
A second counting circuit 15 obtains a count output signal when the count value of the clock pulses is obtained, and a second counting circuit 15 that counts the clock pulses and calculates a predetermined value for a set time (approximately 10 seconds or more). Third counting circuit 1 from which a counting output signal is obtained when a numerical value is obtained
6, and a second electric circuit that inputs the output of the first electric circuit to the reset terminal of the second counting circuit, prohibits counting when the output is at a high level, and performs counting when the output is at a low level. Then, the third counting circuit 16 starts counting based on the counting output signal from the second counting circuit 15, and the third electrical circuit resets and holds the counting circuit based on the counting output signal from the counting circuit. The lamp is comprised of a circuit and an energization control circuit that energizes and lights up the lamp only during the time period when the above-mentioned counting is performed by the third counting circuit.

Second means: a microphone that receives sound waves input from a sound source, a waveform shaping circuit that amplifies the output, rectifies one wave, and shapes it into a rectangular wave signal train, and an oscillation circuit that oscillates and outputs a clock pulse; A first counting circuit 10 inputs the above-mentioned rectangular wave signal and counts the number thereof, and counts the above-mentioned clock pulses and obtains a count output signal when a count value of clock pulses at a set time is obtained. A clock circuit 30 that can measure elapsed time by
When the count output of the timer circuit is obtained, only when the count value of the first counting circuit 10 is between the first set value and the second set value, that is, 5KC~
A low level output is obtained by inputting the count output only when it corresponds to the frequency of the sound wave of 8KC, and when the count value is smaller than the first set value or the second
A first electrical circuit that obtains a high level output when the output is larger than a set value, and a count value of clock pulses for a set time (about 1 second or more) is obtained by counting the clock pulses described above. Sometimes a second counting circuit 15 from which a counting output signal is obtained
and a third counting circuit 16 which counts clock pulses and obtains a count output signal when a predetermined count value is obtained for a set time (approximately 10 seconds or more).
and a second electrical circuit that inputs the output of the first electrical circuit to a reset terminal of the second counting circuit, prohibits counting when the output is at a high level, and allows counting when the output is at a low level. , a third electric circuit that starts counting in the third counting circuit 16 by the counting output signal of the second counting circuit 15, and resets and holds the counting circuit by the counting output signal of the counting circuit; and an energization control circuit that energizes and lights up the lamp only during the time period when the above-mentioned counting is being performed by the third counting circuit.

[Effect]

According to the means of the present invention, it is possible to use an IC, so it is small and inexpensive, and the upper limit of the input sound wave is
Since only around 8KC and the lower limit 5KC can be selected, erroneous signals can be removed.

Also, even if an impact sound is input, only a sound wave that lasts about 1 second is selected, regardless of its intensity. Therefore, there is an effect of removing erroneous signals.

Also, since it automatically turns off after being turned on for about 10 seconds, even if it turns on due to an erroneous signal, it will automatically turn off.

〔Example〕

FIG. 1 shows the appearance of the device of the present invention, and although it may be of any shape, in this embodiment the lamp 1 is made of a spherical plastic material (semi-transparent).
A control circuit, a battery, and a light bulb are provided inside, and a microphone 2 is buried at the top. By lighting the internal light bulb, the upper half of the lamp 1 is uniformly illuminated. Further, the symbol L indicates the floor surface on which the lamp 1 is placed, and since the center of gravity is at the bottom, it is designed so that even if it falls down by pushing in the direction of the arrow, it will automatically return to its original position.

Resonant fricative sounds are generated when a person's breath is forced to pass between the tongue and the roof of the mouth. This sound wave has a frequency that is about 10 times higher than the sound wave produced using the vocal cords, and because it is a resonant sound, it has a waveform that is relatively close to a sine wave. This sound has a similar feel to the sound of "shh".

When the user utters the above-mentioned voice toward the lamp 1, the lamp 1 lights up. The light will turn off automatically in about 10 to 20 seconds.

The reason why the light turns off automatically is to prevent the battery from completely depleting if the light turns on due to external noise.

When you wake up in the dark, especially in the middle of the night, and look at the clock, when you leave bed at midnight for errands, when you meet a sudden disaster at midnight, etc., the lamp is lit by your breath, so it is effective. It is something that technical means can provide.

Next, an embodiment of the control circuit will be described with reference to FIG.

In FIG. 2, symbol 2 is a moving coil type microphone, the output of which is adjusted by a variable resistor 3, amplified by an operational amplifier 4, and shaped into a rectangular wave by an operational amplifier 5. The waveforms at the point C are shown as electrical signals 5a, 5b, . . . in the time chart of FIG.

Symbol 13 surrounded by a dotted line is a well-known clock pulse oscillation circuit, and the output at point A is shown as symbol 13a in the time chart of FIG.

Since this output is input to the C terminal of the D-type flip-flop circuit 14, the output waveform at the Q terminal, that is, at point B is shown as symbol 14a in FIG.

The output at point C and the output from the terminal of the D-type flip-flop circuit (hereinafter abbreviated as D-type circuit) 14 are as follows.
Since the signals are respectively input to the D terminal and C terminal of the D-type circuit 6, the output waveform of the Q terminal, that is, the output waveform of the point D, is as shown by symbols 6a, 6b, . . . in FIG. The electrical signals 6a, 6b, ... and the output of point A, that is, the clock pulse indicated by symbol 13a in FIG.
The outputs obtained through the inverting circuit 9 are respectively D
Since the signal is input to the D terminal and C terminal of the type circuit 7, the output of the terminals, that is, the output of the point E becomes the electrical signals 7a, 7b, . . . in FIG.

The terminal output of the D-type circuit 7 and the Q of the D-type circuit 6
Since the outputs of the terminals are respectively input to the AND circuit 8, the outputs at point F become the electrical signals 20a and 20b in FIG.

The output of the AND circuit 8 is input to the R terminal (reset terminal) of the counting circuit 10. Counting circuit 1
0 is 8 bits, output terminals Q ₅ , Q ₆ , Q ₇ ,
Only Q ₈ is shown.

A clock pulse is input from the C terminal of the counting circuit 10, and when the count value is between 80 and 127, Q ₅ ,
The output of the Q ₆ and Q ₇ terminals will be 101, 011, or 111. With such an output signal, the AND circuits 8b,
The output of point H via 8c and OR circuit 11 is held at high level, and in the case of other count values,
held at low level.

When the count value exceeds 127, the output of the terminal _Q8 becomes high level, so the output via the inverting circuit 9a becomes low level, and the output of the AND circuit 8a becomes low level. Therefore, the clock pulse input is cut off.

Since the output of the F point of the AND circuit 8 is the electrical signals 20a and 20b shown in FIG. 3, this interval corresponds to one cycle of the input sound wave.

Since the electric signal 20a is input to the R terminal of the counting circuit 10, it is reset and then counting is started.

When the frequency of the input sound wave is smaller than the first set value, when the next electric signal 20b arrives,
Since the count value exceeds 127, the output of terminal _Q8 becomes high level, and one input of AND circuit 8a becomes low level, so there is no output from AND circuit 8a and counting stops. The arrival of the electrical signal 20b resets the counting circuit 10 again and starts counting. However, in this state, the output at the H point is always at a low level, so the output from the terminal of the D circuit 12, that is, at the I point, is held at a high level.

When the frequency of the input sound wave is greater than the second set value, the count value is less than 80, Q ₅ , Q ₆ , Q ₇
The output of the OR circuit 11 based on the output of , ie, the output of point H, is at a low level. Next electrical signal 20b
At the time of arrival, the input of the D terminal of the D circuit 12 is at a low level, so the output of the I terminal is also at a high level.

In any of the above cases, at least one of the inputs of the OR circuit 11a is at a high level, so
Counting by the counting circuit 15 is prohibited.

When the frequency of the input sound wave is between the first and second set values, Q ₅ , Q ₆ ,
Due to the output of the terminal _Q7 , the output of the H terminal of the OR circuit 11 becomes high level, and therefore the output of the I terminal becomes low level, and via the OR circuit 11a,
Since the R terminal of the counting circuit 15 becomes low level,
Counting begins.

When the count reaches a predetermined value, the output of the Q _o terminal becomes high level. Practically, this time is preferably about 1 second.

The output of the Q _o terminal is the flip-flop circuit 17.
Since the signal is input to the S terminal of the terminal, the output of the Q terminal becomes high level, which makes the transistor 18 conductive and lights up the light bulb 19. Symbol 19a is the power supply positive terminal.

If the bulb 19 is a fluorescent lamp, corresponding known measures are adopted. Even when the power source 19a is an alternating current source, the lighting can be controlled by the output of the Q terminal using a well-known switching means.

At this time, since the output of the terminal becomes low level, the R terminal of the counting circuit 16 also becomes low level, and counting is started. Further, since the output of the Q terminal of the flip-flop circuit 17 is inputted to the R terminal of the counting circuit 15 via the OR circuit 11a, the counting is stopped.

When about 10 seconds have elapsed since the counting of the counting circuit 16 has progressed, the output of the Q _o terminal becomes high level, and the R terminal of the flip-flop circuit 17 receives a high level input, which is inverted.

Therefore, transistor 18 is turned non-conductive, light bulb 19 is extinguished, and counting circuit 16 is reset and counting is stopped.

At this time, the output of the Q terminal of the flip-flop circuit 17 is at a low level, but since the input audio signal to the microphone 2 has already been stopped, the electrical signal 20b in FIG.
It is not input to the R terminal of 0. Therefore, counting progresses and a high level output is obtained from the _Q8 terminal,
Since the output of the AND circuit 8a is cut off, counting is stopped and the _Q8 terminal remains held at a high level.

Therefore, since one input of the OR circuit 11a is at a high level, the operation of the counting circuit 15 is stopped.

Although the counting circuits 15 and 16 operate as time-measuring circuits, it is also possible to use a single counting circuit for both of them to measure the time of about 1 second and about 10 seconds as described above.

It would be effective if the time during which the light bulb 19 is turned on by the counting circuit 16 can be arbitrarily adjusted using a manually adjusted changeover switch. For this purpose, the purpose is achieved by providing a plurality of _Qo terminals of the counting circuit 16 with different count values, and switching these terminals to input the R terminal of the flip-flop circuit 17.

The period of audio input to the microphone 2 is shorter than 1 second, and the counting circuit 10 is
Even when the frequency is such that the outputs of the Q ₅ , Q ₆ , and Q ₇ terminals are at a high level, lighting of the light bulb 19 must be prohibited. This is due to the following reason.

When you drop an item on the desk, the sound of something hitting, etc.
It often has a frequency similar to the vocal sound "shi". In this case, since the duration of the sound is less than 1 second, this is utilized to prohibit lighting. Next, I will explain it.

Even with the short time sound input mentioned above, Q ₅ , Q ₆ ,
The output of point H due to the output of _Q7 becomes high level.
However, since the input of the electric signal 20b in FIG. 3 is interrupted, the counting of the counting circuit 10 progresses, the output of the _Q8 terminal becomes high level, and the input of the R terminal of the counting circuit 15 via the OR circuit 11a becomes high. The level becomes high and counting is stopped. Therefore, the output of the Q _o terminal remains at a low level, so the light bulb 19 is not lit.

As mentioned above, the frequency of the sound produced by human exhalation passing between the tongue and the roof of the mouth is about 10 times higher than that of general vocalizations that use the vocal cords. The sound waves produced by the above-mentioned pronunciation of "see" are resonant fricative sounds with a frequency of about 5 to 8 KC, although there are differences between men and women and between individuals.

Since the counting circuit 10 is an 8-bit one, the frequency of the output clock pulse of the oscillation circuit 13 is selected, and 80 counts is used as the input for 8KC microphone 2, and 127 counts is used as the input for 5KC. In the case of , when there is a sound input to the microphone 2, Q ₅ of the counting circuit 10,
As mentioned above, the outputs of Q ₆ and Q ₇ are 101, 011,
It will be one of 111.

Therefore, the output of the OR circuit 11 becomes high level, the light bulb 19 lights up, and turns off automatically after about 10 seconds.

When the "sh" input is within 1 second, the light bulb 19 does not light up as described above.

Also, the light bulb 2 does not light up when other sounds with frequencies below 5KC and above 8KC are input.

Due to the above-mentioned effects, when the sound of shushing is input into the microphone 2 for more than one second, the light bulb 19 lights up. Furthermore, even if the light turns on due to an erroneous signal, it will automatically turn off after 10 seconds, preventing battery consumption.

The input signal selection described above is accurate because it uses a counting circuit, and because it can be integrated into an IC, it is small, lightweight, and inexpensive.

Since the light bulb 19 and the circuit and battery shown in FIG. 2 are housed inside the lamp 1 shown in FIG. 1, a lamp whose lighting can be controlled as described above can be obtained by uttering "shhh".

The embodiment shown in FIG. 4 is a simplified version of the circuit shown in FIG. That is, the D-type flip-flop circuits 6, 7, and 14 of FIG. 2 are removed. Components with the same symbols as in FIG. 2 are the same members.

Dotted line 13 is the clock pulse oscillation circuit shown by dotted line 13 in FIG.

The output of the operational amplifier 5 shown in FIG. 2 is inputted from the terminal 21 shown in FIG. This input becomes electrical signals 5a and 5b in FIG.

The symbol 22 is the AND circuit 8 in FIG.
A circuit including circuits b, 8c, and an OR circuit 11 is shown as a block.

Electric signals 5a and 5b from the input sound waves of the microphone 2 in FIG. 2 are input to the terminal 21, and differential pulses via the capacitor 24 are indicated by symbols 27a and 27b in the time chart of FIG. 3.

The counting circuit 10 has the same configuration as in FIG.
The input clock pulse through the AND circuit 8a is 80
~127, at least two outputs from the Q ₅ , Q ₆ , and Q ₇ terminals become high level outputs, and the circuit 22
The output becomes high level. When the number of pulses is 127 or more, the output of the _Q8 terminal becomes high level, so one input of the AND circuit 8a becomes low level, and the input of the clock pulse is cut off.

When the electrical signal 5a shown in FIG. 3 is input to the terminal 21, the electrical signal 27a shown in FIG. 3 is input to the C terminal of the D-type circuit 23, but since the input level of the D terminal is low level, is maintained at a high level.

At this time, since the clock pulse has already been input to the counting circuit 10, the electrical signal 5a
In response to the input, the reset counting circuit 10 starts counting and counts only in the section indicated by the arrow M in FIG.

When this count value is smaller than 80, that is, when the frequency of the input sound wave is larger than 8KC, the D-type circuit 2
Since the input to the D terminal of No. 3 is at a low level, even if the electric signal 27b is input to the C terminal, the output of the terminal is at a high level. The situation is exactly the same for the same signal that is input sequentially after the electrical signal 27b. When the frequency of the input sound wave is lower than 5KC, the output of the _Q8 terminal is at a high level, so the input of the clock pulse via the AND circuit 8a is cut off.

When the input sound wave is between 5KC and 8KC, as mentioned above, the output of the circuit 22 becomes high level,
Upon input of the electric signal 27b, the D circuit 23 is inverted and the output of the terminal becomes low level.

Therefore, all the inputs to the OR circuit 11a become low level, so the input to the R terminal of the counting circuit 25 becomes low level, and counting is started.

When the counting time exceeds 1 second, a high-level signal is obtained from the _Qo terminal, and is input to the S terminal of the flip-flop circuit 17, setting the Q terminal to a high level. Therefore, the differential pulse passing through the capacitor 26 is sent to the counting circuit 2 via the OR circuit 11a.
It is reset by being input to the R terminal of 5, and counting is started again by the input clock pulse of the C terminal. Counting is performed repeatedly in this way, and an electrical signal is obtained from the Q _o terminal every second.

At the same time, the base input of the transistor 18 is obtained, and the light bulb 19 lights up. At the same time, since the output of the terminal of the flip-flop circuit 17 becomes low level, the R terminal of the counting circuit 24 becomes low level and counting is started. This clock pulse is input to the counting circuit 24 every second. When the input is made 10 times, the terminal 24a becomes high level, so the R terminal of the flip-flop circuit 17 becomes high level, and inverted, the Q terminal becomes low level, the transistor 19 is turned non-conductive, and the light bulb 19 is turned off. Lights out.

The counting of the counting circuit 24 is stopped due to the output of the terminal which becomes high level at the same time.

When the input sound wave of the microphone 2 is within 1 second, before the Q _o terminal of the counting circuit 25 is obtained,
Since the part indicated by the arrow M in FIG. 3 is extended, the counting of the counting circuit 10 progresses, the _Q8 terminal becomes high level, the input clock pulse of the counting circuit 10 is cut off, and one of the OR circuits 11a Since the input becomes high level, the counting circuit 25 is also reset and counting stops.

Therefore, the output of the _Qo terminal of the counting circuit 25 remains at a low level, so the light bulb 19 does not light up.

As can be understood from the above explanation, when the input sound wave called "see" continues for more than 1 second, the light bulb 19 lights up for 10 seconds, and when the input sound wave has a frequency of 5KC or less and 8KC or more, the light bulb 19 does not light up.

The objects of the invention are thus achieved.

The changeover switch indicated by the symbol N is used to manually change the lighting time described above. That is,
When switching to terminals 24b, 24c, terminals 24b,
24c becomes high level when the input pulse to the C terminal is obtained 20 times or 30 times, so the lighting time can be selected to be 20 seconds or 30 seconds.

Next, referring to FIG. 5, another embodiment of the device of the present invention will be described. In FIG. 5, a microphone 2 and operational amplifiers 4 and 5 are the same as the members with the same symbols in FIG. 2, and their functions are also the same.

The same applies to the oscillation circuit 13 and the D-type circuit 14. Therefore, the electrical signals at points A, B, and C are represented by symbols 13a, 14a, and 5 in the time chart of FIG.
It is displayed as a, 5b.

The output of the Q terminal of the D-type circuit 6, that is, the output of point D, becomes electrical signals 6a, 6b, . . . in FIG. Further, the output of the Q terminal of the D-type circuit 7, that is, the output of the point E, becomes electrical signals 7a, 7b, . . . in FIG.

Therefore, the electrical signal E becomes a clock pulse that is input to the counting circuit 10 via the AND circuit 8a.

Since the inputs of the AND circuit 28 are the inverted electrical signal E, the electrical signal D, and the electrical signal B, the output is indicated by the symbol 28 in FIG.
It is displayed as a, 28b. This output is F
It is output as a point. When there is a sound wave input to the microphone 2, the flip-flop circuit 29 is inverted by the first electrical signal 28a in FIG.
The terminal becomes low level. Therefore, the counting circuit 10
is reset, and the electrical signals of the input sound waves (electrical signals 7a, 7b, 7b in FIG. 6,
…) Count the number of.

The counting circuit 30 is a counting circuit that uses the output of the D-type circuit 14 as a clock pulse. When a predetermined count value is completed, a high-level signal is obtained from the Caut (carry) terminal, and the output of the OR circuit 11 is sent to the D-type circuit. 12, and the R terminal of the flip-flop circuit 29 is energized to invert it. Therefore, since the output of the terminal becomes high level, the counting circuit 10 is reset. Due to the next high level output from point F, the flip-flop circuit 29 is inverted,
The output of the terminal becomes low level.

As can be understood from the above explanation, the counting circuits 10 and 30 are
starts counting, and electrical signals 28 that arrive sequentially
b, 28c, . . . do not prevent the above-mentioned counting from proceeding. However, after the counting of the counting circuit 30 is completed, the counting of the counting circuit 10 is stopped, and the counting of the counting circuit 10 is started again in the same manner by the electric signal of the next point F.

The counting circuit 10 counts the frequencies of the electric signals 7a, 7b, . When this frequency is below 5KC, Q ₅ ,
At most one of the outputs of the Q ₆ and Q ₇ terminals is high level, and when the output is between 5KC and 8KC, Q ₅ , Q ₆ ,
The counting time width described above is set so that at least two of the outputs of the _Q7 terminal are at a high level.

Moreover, when it exceeds 8KC, the output of the _Q8 terminal becomes high level.

The outputs of the Q ₅ , Q ₆ , Q ₇ , and Q ₈ terminals mentioned above are the second
The situation is exactly the same as in the case shown in the figure. Also, circuits that process the output, namely AND circuits 8b and 8c, OR circuits 11 and 11a, D-type circuit 12, and counting circuit 1
5, 16, flip-flop circuit 17, transistor 18, and light bulb 19 perform exactly the same functions as those with the same symbols in FIG. 19 lights up for only 10 seconds.

The objects of the invention are thus achieved.

It is clear that the circuit of FIG. 5 can also be modified to the concept shown in the circuit of FIG.

〔effect〕

There are an extremely large number of people who wish to wake up in the middle of the night and check the clock to see what time it is. Many people leave low-output electric lights on for this purpose. This is a huge waste of power.

There are many elderly people who fall and break their legs due to the darkness when getting off bed to run errands in the middle of the night.

In order to eliminate the above-mentioned inconveniences, there is a need for a lamp that has a simple configuration and can be turned on by a person's voice.

The device of the present invention answers this demand and has several effects described below.

First, since the control circuit can be integrated into an IC, the main component of the electric circuit of the device of the present invention is a counting circuit, as described in lines 15 to 17 from the top of page 14 of this specification. , a clock circuit, and a flip-flop circuit, so there are many digital signal processing circuits and few analog circuits. Therefore, it has the effect of facilitating IC implementation.

Second, since it is controlled to turn on only when the input sound wave of 5KC to 8KC continues for about 1 second or more, it is extremely unlikely that the lamp will turn on due to an erroneous signal.

Thirdly, since the light is automatically turned off after being turned on for a predetermined period of time, the power supply battery will not be consumed even if the light is turned on due to an erroneous signal.

[Brief explanation of drawings]

FIG. 1 is an external view of the device of the present invention, FIG. 2 is a control circuit diagram of the device of the present invention, FIG. 3 is a time chart of voltages at various parts of the circuit of FIG. 2, and FIG. 4 is a diagram of the device of the present invention. Another embodiment of the control circuit of the apparatus, FIG. 5 shows another embodiment of the control circuit, and FIG. 6 shows a time chart of voltages at various parts of the circuit of FIG. 1... Lamp, 2... Microphone, 4, 5... Operational amplifier, 6, 7, 12, 14, 23... D-type flip-flop circuit, 13... Oscillation circuit, 8, 8a, 8
b, 8c, 28... AND circuit, 11, 11a... OR circuit, 10, 15, 16, 24, 25, 30...
Counting circuit, 17, 29...flip-flop circuit,
18... Transistor, 19... Light bulb, 19a... Power supply positive electrode, N... Changeover switch, 22... AND circuit 8
b, 8c, circuit including OR circuit 11, 13a, 1
4a...Clock pulse, 5a, 5b, 6a, 6
b, 7a, 7b...Electrical signals obtained by shaping input sound waves into rectangular waves, 20a, 20b, 27a, 27b, 28
a, 28b...Electric signal with a width corresponding to one wavelength of the input sound wave.

Claims (1)

[Scope of Claims] 1. A microphone that receives sound waves input from a sound source, a waveform shaping circuit that amplifies the output, rectifies one wave, and shapes it into a rectangular wave signal train, and an oscillation device that oscillates and outputs clock pulses. a first counting circuit 10 that sequentially counts clock pulses within an interval corresponding to the width of the rectangular wave signal;
A low level output is obtained by inputting the counting output only when the count value of the counting circuit is between the first set value and the second set value, that is, only when it corresponds to the frequency of the sound wave from 5KC to 8KC. a first electric circuit which obtains a high level output when the count value is smaller than the first set value or larger than the second set value; , a second counting circuit 15 that provides a count output signal when a count value of clock pulses for a set time (about 1 second or more) is obtained;
a third counting circuit 16 that counts the aforementioned clock pulses and obtains a count output signal when a predetermined count value is obtained for a set time (approximately 10 seconds or more); a second electrical circuit that inputs the output of the electrical circuit to a reset terminal of the second counting circuit, prohibits counting when the output is at a high level, and allows counting when the output is at a low level; and a second counting circuit. a third electrical circuit that starts counting in a third counting circuit 16 by the counting output signal of the circuit 15, resets and holds the counting circuit by the counting output signal of the counting circuit; A device for controlling the lighting of a lamp by means of sound waves, characterized by comprising an energization control circuit that energizes and lights the lamp only during the time period when the above-mentioned counting is performed by the counting circuit. 2. A microphone that receives sound waves input from a sound source, a waveform shaping circuit that amplifies the output, rectifies one wave, and shapes it into a rectangular wave signal train, an oscillation circuit that oscillates and outputs a clock pulse, and the above-mentioned rectangular waveform. The first counting circuit 10 inputs a wave signal and counts the number of clock pulses, and a counting output signal is obtained when a counted value of clock pulses at a set time is obtained by counting the aforementioned clock pulses. , a clock circuit 30 that can measure elapsed time.
When the count output of the timer circuit is obtained, only when the count value of the first counting circuit 10 is between the first set value and the second set value, that is, 5KC~
A low level output is obtained by inputting the count output only when it corresponds to the frequency of the sound wave of 8KC, and when the count value is smaller than the first set value or the second
A first electrical circuit that obtains a high level output when the output is larger than a set value, and a count value of clock pulses for a set time (about 1 second or more) is obtained by counting the clock pulses described above. Sometimes a second counting circuit 15 from which a counting output signal is obtained
and a third counting circuit 16 which counts clock pulses and obtains a count output signal when a predetermined count value is obtained for a set time (approximately 10 seconds or more).
and a second electrical circuit that inputs the output of the first electrical circuit to a reset terminal of the second counting circuit, prohibits counting when the output is at a high level, and allows counting when the output is at a low level. , a third electric circuit that starts counting in the third counting circuit 16 by the counting output signal of the second counting circuit 15, and resets and holds the counting circuit by the counting output signal of the counting circuit; and an energization control circuit that energizes and lights the lamp only during the time period when the above-mentioned counting is performed by the third counting circuit. .