JPH0663089A - Vibrating signal generating device for transducer - Google Patents

Abstract

PURPOSE:To obtain a vibrating signal in which a signal component of an ultra- low frequency band is large in order to realize effective 1/f vibration. CONSTITUTION:An audio signal outputted from a pre-amplifying circuit 10 is inputted to a delaying circuit 30, and the delaying circuit 30 delays the audio signal until a prescribed number of clocks are inputted from a delay clock generating circuit 50 and outputs it. The delay clock generating circuit 50 repeats an ascent and a descent of a clock frequency at every prescribed period, and a delay time in the delaying circuit 30 is always varied. When the delay time becomes long, the frequency of the audio signal becomes low, a component of a low frequency band becomes a component of an ultra-low frequency band, and the component of the ultra-low frequency band required for 1/f vibration is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transducer vibration signal generation for converting a sound signal and supplying a vibration signal to the transducer, thereby applying vibration to the human body by the transducer to recover mental and physical fatigue. More particularly, the present invention relates to a vibration signal generator for a transducer that generates a vibration signal in an ultra low frequency range.

[0002]

2. Description of the Related Art Transducers are devices that are placed in chairs, beds, etc. to vibrate the human body. By applying vibration to the human body in accordance with music, etc., it is possible to recover physical and mental fatigue and eliminate stress. effective.

On the other hand, a vibration signal generator for a transducer is a device for generating a vibration signal for vibrating a human body with this transducer, and generates a vibration signal in an ultra low frequency range.

Conventionally, such a vibration signal generator for a transducer is provided with a local oscillator and a mixer for mixing and outputting an oscillation signal output from the local oscillator and a tone signal input from the outside. It has been known.

In such a configuration, when a tone signal is input to the mixer from the outside and an oscillation signal is input from the local oscillator to the mixer, the mixer outputs a vibration signal, which is a mixture of both signals, to the outside of the transducer. Output to the drive amplifier of. A beat is generated in this vibration signal, and the drive amplifier amplifies the beat component and outputs it to the transducer, so that the transducer generates mechanical vibration.

[0006]

By the way, in the human body physiology, the relationship between the frequency component of the vibration applied to the human body and the output is so-called "1 / f relationship (1 / f
It has been pointed out that the effect of recovering mental and physical fatigue is great in the case of "f vibration)".

However, in the above-mentioned conventional vibration signal generator for a transducer, the frequency component of the musical tone signal is high, and the level of the oscillation signal output by the local oscillator is relatively increased as compared with the musical tone signal. Therefore, there is a problem that it is not possible to obtain a large signal in the ultra-low frequency range necessary for 1 / f vibration.

The magnitude of the signal component is expressed by [signal magnitude × time], and in order to realize 1 / f oscillation, not only the magnitude of the signal in the ultra-low frequency range but also its output time must be obtained. Is also necessary. However, in the conventional vibration signal generator for a transducer, the time (reverberant time) cannot be lengthened, and there is also a problem that it is difficult to realize 1 / f vibration.

The present invention has been made in view of the above problems, and in order to realize effective 1 / f vibration, a vibration for a transducer capable of obtaining a vibration signal having a large signal component in an ultralow frequency range. An object is to provide a signal generator.

[0010]

In order to achieve the above object, the invention according to claim 1 is a vibration signal generator for a transducer for inputting a sound signal, converting the sound signal into a vibration signal for driving the transducer, and outputting the vibration signal. In the above, the sound signal delay means for inputting the sound signal, delaying the sound signal for a predetermined time, and outputting the sound signal is provided.

The invention according to claim 2 provides the invention according to claim 1.
In the vibration signal generator for the transducer according to,
The sound signal delay means includes a delay means capable of changing the delay time, inputting the sound signal, delaying the sound signal for a predetermined time and outputting the sound signal, and delay time control means for sequentially changing the delay time in the delay means. It is provided as a configuration.

Further, the invention according to claim 3 is the vibration signal generator for a transducer according to claim 2, wherein the delay time control means changes the delay time according to the magnitude of the sound signal. The configuration is provided with a delay mode changing unit for changing the delay mode.

According to a fourth aspect of the present invention, in the vibration signal generator for a transducer according to the third aspect, when the delay mode changing means detects that the sound signal becomes large by the detecting means. The delay time is changed so as to be long.

[0014]

In the invention according to claim 1 configured as described above, since the sound signal delay means inputs the sound signal and delays it for a predetermined time and outputs it, the frequency of the sound signal is lowered by the mode of delay. .

Further, in the invention according to claim 2 configured as described above, the delay means capable of changing the delay time outputs the input sound signal after delaying the input sound signal by a predetermined time. Sequentially changes the delay time in this delay means. When the delay time becomes long, the frequency of the sound signal decreases, so that the components in the relatively low frequency range are converted into the components in the ultra-low frequency range and output. Further, the output timing has a delay with respect to the sound signal, and the reverberant time required for 1 / f vibration is generated.

Further, in the invention according to claim 3 configured as described above, the delay mode changing means in the delay time control means changes the change mode of the delay time according to the magnitude of the sound signal.

Since the magnitude of the sound signal is irregular,
This causes the delay time to change irregularly. Therefore, there are many opportunities to change the delay time so that the delay time becomes long, and the frequency of changing the frequency of the sound signal and outputting the sound signal increases.

Further, in the invention according to claim 4 configured as described above, the delay mode changing means is changed so that the delay time becomes longer when the sound signal is detected by the detecting means as becoming larger. Let That is, since the frequency is lowered when the sound signal is large, the component in the ultra-low frequency range is output with a large output value.

[0019]

As described above, according to the present invention, since a sound signal is input and delayed by a predetermined time and then output, the frequency of the sound signal can be lowered depending on the mode of delay, and an effective 1 / It is possible to provide a vibration signal generator for a transducer capable of outputting a signal in an ultra-low frequency range necessary to realize f vibration.

According to the second aspect of the present invention, the delay time is sequentially changed to create the component in the ultra-low frequency range, and the delay time always occurs with respect to the sound signal. More effective 1 / f vibration can be realized by the frequency range component and the reverberant time.

In particular, according to the inventions of claims 3 and 4, it is possible to irregularly increase the frequency at which the components in the ultra-low frequency range are output, and to further improve the effect of recovering from physical and mental fatigue. Become.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a transducer driving unit to which a transducer vibration signal generator according to an embodiment of the present invention is applied.

In the figure, a radio, a cassette tape,
An audio signal output from a sound source such as a CD is input to a preamplifier circuit 10. The preamplifier circuit 10 adjusts various timbres and the like, and a trigger circuit (delay mode changing means) 20 and a delay circuit (delay means). 30 and the power amplifier circuit 40.

The trigger circuit 20 outputs a pulse signal for triggering when the level of the input audio signal is higher than a predetermined threshold value Th, and normally outputs a high level signal to output the audio signal. When the level of is higher than the threshold value Th, a low level signal is output.

The output signal of the trigger circuit 20 is input to a delay clock generating circuit 50 which generates a clock while successively changing the frequency, and this delay clock generating circuit (delay time control means) 50 is a trigger from the trigger circuit 20. The frequency changing mode is changed based on
As shown in FIG. 2, the delay clock generation circuit 50 includes a control signal generation unit 5 that outputs a control voltage signal in which a voltage value repeatedly rises and falls during a period based on a predetermined time constant.
1 and a voltage controlled variable frequency oscillating unit 52 that generates a clock having a frequency corresponding to the voltage value of the control voltage signal output from the control signal generating unit 51. The change mode of the control voltage signal is changed based on

The control signal generator 51 has a range of 0.2-.
First operational amplifier 5 that outputs a 1.0 Hz rectangular pulse
1-1, and a second operational amplifier 51-2 that generates a control voltage signal that repeatedly rises and falls within a predetermined range based on the output pulse of the first operational amplifier 51-1. Further, the voltage control variable frequency oscillator 52 includes a capacitor 52-1 and a diode 52-2,
The capacitance of the capacitor 52-1 and the diode 52-2
The basic clock frequency is determined by the reverse bias resistance value of.

The clock output from the voltage controlled variable frequency oscillating unit 52 of the delay clock generating circuit 50 is input to the delay circuit 30, and the delay circuit 30 outputs the audio signal output from the preamplifier circuit 10 to the predetermined clock. Delay only while inputting a number. That is, the delay circuit 30 A / D-converts the audio signal, stores it until a predetermined number of clocks are input, and then D / A-converts it and outputs it. In this embodiment, the delay circuit 30 is constructed using BBD.

The audio signal delayed by the delay circuit 30 is input to the high-pass filter 60, which removes high-frequency components and distortion components unnecessary for driving the transducer and outputs them. Further, the 1 / f characteristic filter 7 is connected in series with the high-pass filter 60.
0 is connected, and the 1 / f characteristic filter 70 inputs the output signal composed of the low frequency component output from the high pass filter 60 and performs filtering corresponding to the frequency component so as to realize 1 / f vibration.

The output signal of the 1 / f characteristic filter 70 is combined with the audio signal output from the preamplifier circuit 10 and input to the power amplifier circuit 40. The power amplifier circuit 40 amplifies the combined signal. Output to drive the vibration unit 80 of the Transducer.

Next, the operation of this embodiment having the above configuration will be described. Now, the input end of the trigger circuit 20 is point a, the output end of the trigger circuit 20 is point b, the output point of the first operational amplifier 51-1 in the control signal generator 51 of the delay clock generator circuit 50 is point c, Second operational amplifier 51-2
The output point of is the point d.

When the power of the transducer driving unit is turned on to use the transducer and the audio signal is input to the preamplifier circuit 10, the preamplifier circuit 10 adjusts the tone color and outputs the adjusted audio signal. To do.

It is assumed that the audio signal is input to the trigger circuit 20 and its waveform is as shown in FIG. 3 (a). Initially, as shown by the waveform, the level of the audio signal is smaller than the threshold Th, and the trigger circuit 20
The output signal of is at a high level as shown in FIG. Then, the output of the first operational amplifier 51-1 becomes a rectangular signal that repeats low level and high level at regular intervals as shown in FIG. 3C, and is the output of the second operational amplifier 51-2. The voltage signal rises or falls at a constant degree of change (slope) as shown in FIG.

FIG. 4A shows the relationship between the output of the first operational amplifier 51-1 and the output of the second operational amplifier 51-2 in this state. When the control voltage signal changes at a constant degree of change as shown in the figure, the frequency of the clock output from the voltage controlled variable frequency oscillating unit 52 regularly repeats rising and falling.

This clock is input to the delay circuit 30, and the delay circuit 30 inputs the audio signal output from the preamplifier circuit 10 and delays it until a predetermined number of clocks are input. Therefore, if the frequency of the clock is constant, the time when a predetermined number of clocks are input is constant, and the delay time of the input audio signal is constant. However, as described above, the clock frequency regularly repeats rising and falling, and when the frequency is high, the audio signal input to the delay circuit 30 has a short delay time and is output early, and the frequency is low. The input audio signal is sometimes output late with a long delay time.

As described above, since the delay time continuously changes based on the control voltage signal, the audio signal input to the delay circuit 30 is longer than the average when the delay time is gradually increasing. The audio signal that is output over time and conversely when the delay time is gradually shortened is output in a time shorter than the average.

When the audio signal is output for a time longer than the average, the frequency of the audio signal changes low, and when the audio signal is output for a time shorter than the average, the frequency changes high. The clock frequency change range in this embodiment is 400 KHz to 40 KHz, and the frequency change range of the audio signal also changes about 10 times from the slowest time to the earliest.

That is, the frequency of the audio signal input to the delay circuit 30 is lowered or raised in the change range of 10 times, and when the frequency is lowered, it is 1
The component in the ultra-low frequency range required to realize the / f vibration is generated.

The audio signal delayed in the delay circuit 30 and having its frequency changed is subjected to the high-pass filter 60.
Only the high frequency components are blocked from passing through. When the frequency becomes high in the delay circuit 30, a component unnecessary for 1 / f vibration is large, so the high-pass filter 60 cuts off the component. After the high frequency components have been cut,
The audio signal is input to the 1 / f characteristic filter 70,
The 1 / f characteristic filter 70 adjusts the relationship between the intensities of frequency components in order to realize 1 / f vibration. That is, the output is increased as the frequency component becomes extremely low, and further lower frequency components which are said to be harmful to the body are cut.

The signal output from the 1 / f characteristic filter 70 is delayed from the audio signal output from the preamplifier circuit 10 by the above-mentioned delay time, and an ultralow frequency component is produced. Therefore, the power amplifier circuit 40 amplifies these combined signals, and the vibrating unit 80 is driven by the amplified signals to obtain 1 / f.
Vibration can be realized, and the effect of recovering from physical and mental fatigue is great.

By the way, when the level of the audio signal input to the trigger circuit 20 becomes larger than the threshold value Th as shown in FIG.
As shown in (b), a trigger pulse is output. Then, the output voltage of the first operational amplifier 51-1 becomes "0", and becomes the low level for a predetermined time in the same manner as when the high level is normally changed to the low level.

Then, the voltage value of the control voltage signal, which is the output of the second operational amplifier 51-2, drops within a period shorter than the normal time. As a result, the voltage controlled variable frequency oscillator 52
The frequency of the output clock of will also try to drop in a shorter time than it should.

FIG. 4 shows the change state of the control voltage signal corresponding to the input timing of the trigger. Figure 4
(1) shows the relationship between the output of the first operational amplifier 51-1 and the voltage value of the control voltage signal when the trigger is not input, and the control voltage signal becomes low level or high level every predetermined period. Repeatedly reaching a level.

When classified according to the timing at which the trigger is input, the trigger is input when the voltage value of the control voltage signal is decreasing in FIGS. 4 (2) and 4 (3). The voltage value of the control voltage signal decreases with a degree of decrease that is greater than the degree of decrease. 4 (4) to FIG.
In (6), the trigger is input when the voltage value of the control voltage signal is increasing, and the voltage value of the control voltage signal starts to decrease from the time of input of the trigger.

In any case, the frequency of the audio signal output from the delay circuit 30 becomes low, which is 1 /
The frequency of generating a component in the ultra-low frequency range for realizing f vibration increases. In addition, since the component in the ultra-low frequency range is generated when the level of the audio signal is high, it is ensured that the component is not only low in frequency but also high, and 1 / f vibration is realized. Easier to do.

Of course, since the trigger is applied according to the level of the audio signal, the generation timing is irregular, and the voltage value of the control voltage signal is lower than that when the voltage value of the control voltage signal is lowered regularly. Will decrease more frequently. That is, the frequency with which the components in the ultra-low frequency range are generated increases.

In this case, the signal obtained from the 1 / f characteristic filter has a large component in the ultra-low frequency range, has reverberant time, and has irregularity in its generation timing. , 1 / f vibration satisfies all the conditions required. Therefore, based on the signal, the power amplifier circuit 40 drives the vibration unit 80 to give comfortable vibrations to various parts of the human body, so that effects such as recovery from fatigue of the body, relief of stress, and calming of the mind can be obtained. it can.

In the above embodiment, the BBD
Although the delay circuit 30 is configured by using, a RAM may be used. That is, the audio signal is written by increasing the write address each time the clock is input, and the read address distant from the write address is also gradually increased. Be sure to use the address where As a result, B
The same delay effect as when using BD can be obtained.

In the above embodiment, the period for increasing the delay time and the period for decreasing the delay time are the same, but the period for shortening the delay time is shortened to reduce the frequency of the audio signal. It is also possible to increase the frequency of generating the component in the ultra-low frequency range by increasing the period for which the frequency is reduced.

Further, the vibration unit 80, which is a transducer, may be incorporated in a commercial or domestic chair or bed, or may be incorporated in a floor of an audio room, a chair of an automobile, or the like. In particular, by disposing it at the driver's seat in an automobile, it is effective in relieving stress during driving due to traffic congestion and the like, and is also effective in measures such as traffic safety.

[Brief description of drawings]

FIG. 1 is a block diagram of a transducer drive unit to which a transducer vibration signal generator according to an embodiment of the present invention is applied.

FIG. 2 is a circuit diagram of a main circuit in a vibration signal generator for a transducer.

FIG. 3 is a diagram showing a signal waveform of a main circuit portion.

FIG. 4 is a diagram showing a relationship between a trigger and a control voltage signal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Preamplifier circuit 20 ... Trigger circuit 30 ... Delay circuit 50 ... Delay clock generation circuit 51 ... Control signal generation unit 52 ... Voltage control variable frequency oscillation unit

Claims (4)

[Claims] 1. A vibration signal generator for a transducer, which receives a sound signal, converts the sound signal into a vibration signal for driving a transducer, and outputs the vibration signal, wherein the sound signal is input, delayed by a predetermined time, and output. A vibration signal generator for a transducer, comprising a delay means. 2. The vibration signal generator for a transducer according to claim 1, wherein the sound signal delay means has a variable delay time, the sound signal is input, and the sound signal is delayed by a predetermined time and output. And a delay time control means for sequentially changing the delay time in the delay means. 3. The vibration signal generator for a transducer according to claim 2, wherein the delay time control means comprises:
A vibration signal generating device for a transducer, comprising a delay mode changing means for changing the change mode of the delay time according to the magnitude of the sound signal. 4. The vibration signal generator for a transducer according to claim 3, wherein the delay mode changing means comprises:
A vibration signal generating device for a transducer, wherein when the sound signal is detected to be large by the detecting means, the delay time is changed to be long.