JP2024056221A - Body-sensing acoustic system and signal generating device - Google Patents

Abstract

[Problem] To provide a technology that can realize a more realistic acoustic experience. [Solution] In a sensible acoustic system 1, a first filter 20a extracts a component of a resonant frequency of a predetermined part of the human body from an input acoustic signal. A first signal generator 22a generates an acoustic vibration signal that includes a reverberation signal of the signal extracted by the first filter 20a and in which the extracted signal has been removed or attenuated. A first vibrator 12a is disposed at a position corresponding to the predetermined part, and generates vibrations based on the acoustic vibration signal generated by the first signal generator 22a. [Selected Figure] Figure 1

Description

The present invention relates to a sensible acoustic system and a signal generating device.

There is a known in-vehicle sound reproducing device that has seat vibrators embedded under the front and rear seats of a vehicle, extracts the low-frequency components of an audio signal, transmits them to the seat vibrator, and vibrates the seat vibrator (see, for example, Patent Document 1).

JP 2002-264732 A

The technology in Patent Document 1 allows users to feel vibrations from the seat vibrator, but depending on the music, they may only feel itchy and may not be able to achieve a sense of realism. As a result, it is insufficient to meet the needs of a wide range of acoustic experiences.

The present invention was made in light of these circumstances, and its purpose is to provide technology that can create a more realistic audio experience.

To solve the above problem, a bodily acoustic system according to one embodiment of the present invention includes a filter that extracts, from an input acoustic signal, components of the resonant frequency of a specific part of the human body; a signal generator that generates an acoustic vibration signal that includes a reverberation signal of the signal extracted by the filter and in which the extracted signal has been removed or attenuated; and a vibrator that is positioned at a position corresponding to the specific part and generates vibrations based on the acoustic vibration signal generated by the signal generator.

Another aspect of the present invention is a signal generating device. This device is arranged at a position corresponding to a predetermined part of the human body, and supplies an acoustic vibration signal to a vibrator that generates vibrations based on the acoustic vibration signal. The device includes a filter that extracts a component of the resonant frequency of the predetermined part from the input acoustic signal, and a signal generating unit that generates an acoustic vibration signal that includes a reverberation signal of the signal extracted by the filter and in which the extracted signal has been removed or attenuated.

In addition, any combination of the above components, and any transformation of the present invention into a method, device, system, recording medium, computer program, etc., are also valid aspects of the present invention.

The present invention makes it possible to achieve a more realistic audio experience.

1 is a block diagram showing a configuration of a bodily acoustic system according to an embodiment; FIG. 2 is a side view showing a seat having the vibrator of FIG. 1 built therein; FIG. 2 is a diagram showing the resonant frequencies of each position of the bones of the human body. 2 is a block diagram showing an example of a configuration of a signal generating unit in FIG. 1 . 5 is a diagram illustrating a relationship between amplitude and time of an acoustic vibration signal output from a signal generating unit in FIG. 4. FIG. 13 is a block diagram showing the configuration of a bodily acoustic system according to a first modified example. FIG. 11 is a diagram illustrating a relationship between amplitude and time of an acoustic vibration signal according to a second modified example. FIG. 13 is a block diagram showing a configuration of a bodily acoustic system according to a third modified example.

FIG. 1 is a block diagram showing the configuration of a sensible acoustic system 1 according to an embodiment. The sensible acoustic system 1 converts an acoustic signal supplied from an existing acoustic signal output device (not shown) into sound waves and outputs the sound waves, and applies vibrations generated based on the acoustic signal to the user's body. The acoustic signal output device may be, for example, a music playback device. The music playback device may be used for source sound sources such as car stereos, CD players, smartphones, and DAPs (Digital Audio Players). Below, an example of the sensible acoustic system 1 being an in-vehicle system mounted in a vehicle will be described, but the present invention is not limited to this. The sensible acoustic system 1 may also be used indoors, etc.

As shown in FIG. 1, the sensible acoustic system 1 includes a signal generating device 10, a first oscillator 12a, a second oscillator 12b, and an acoustic output device 14. The first oscillator 12a and the second oscillator 12b are collectively referred to as oscillator 12. The multiple functional blocks of the signal generating device 10 can be configured in hardware with circuit blocks, memory, and other LSIs, and are realized in software by a CPU executing a program loaded into memory. Therefore, it will be understood by those skilled in the art that these functional blocks can be realized in various forms using only hardware, only software, or a combination of both, and are not limited to any one of them.

The acoustic signal output from the acoustic signal output device is supplied to the signal generating device 10 and the acoustic output device 14. The acoustic output device 14 includes, for example, multiple speakers installed in the vehicle cabin, and converts the supplied acoustic signal into sound waves and outputs them. This allows the user to listen to the played music.

The signal generating device 10 generates a first acoustic vibration signal and a second acoustic vibration signal based on the supplied acoustic signal, supplies the first acoustic vibration signal to the first vibrator 12a, and supplies the second acoustic vibration signal to the second vibrator 12b. The first acoustic vibration signal and the second acoustic vibration signal are collectively referred to as acoustic vibration signals.

The vibrator 12 is built into the vehicle seat and generates vibrations based on the supplied acoustic vibration signal. The vibrator 12 may be any of the existing vibrators, such as electrodynamic, piezoelectric, or electrostatic types.

Figure 2 is a side view showing a schematic diagram of a seat 30 having a built-in vibration exciter 12 of Figure 1. The vibration exciters 12 are arranged, for example, on the backrest of the seat 30. Each of the vibration exciters 12 is arranged at a position corresponding to a different predetermined part of the human body. The first vibration exciter 12a is arranged, for example, at a position corresponding to the fourth thoracic vertebra, which is a first predetermined part of the human body. That is, the first vibration exciter 12a is installed at a position that is expected to be located near the fourth thoracic vertebra when a user sits on the seat 30. The second vibration exciter 12b is arranged, for example, at a position corresponding to the third lumbar vertebra, which is a second predetermined part of the human body. That is, the second vibration exciter 12b is installed at a position that is expected to be located near the third lumbar vertebra when a user sits on the seat 30.

Figure 3 shows the resonant frequency of each position of the bones in the human body. When the vibrator 12 generates vibrations of a specified frequency, the vibration level felt by the body varies greatly depending on the part of the body to which the vibrations are applied. This is thought to be due to the effect of the resonant frequency of bone vibrations (which can also be called resonant frequency). According to the research of Dr. Alfred Tomatis, as shown in Figure 3, the resonant frequency of bone vibrations is said to be higher in the skull than in the spine. The resonant frequency of the spine increases the higher it goes from the sacrum, lumbar vertebrae, thoracic vertebrae, to cervical vertebrae. The resonant frequency of the skull is also higher in the parietal bone than in the occipital bone. Therefore, the lower the frequency of vibrations, the higher the vibration level felt by the body will be.

In the example of FIG. 2, it is assumed that the frequency of the vibration generated by the first vibrator 12a is 1500 Hz. Therefore, the user can experience a relatively large vibration level of 1500 Hz near the fourth thoracic vertebra. It is assumed that the frequency of the vibration generated by the second vibrator 12b is 500 Hz. Therefore, the user can experience a relatively large vibration level of 500 Hz near the third lumbar vertebra.

The vibrator 12 converts the acoustic vibration signal into vibration, which is then transmitted to the human body via the backrest of the seat 30, creating a powerful musical experience with a synergistic effect with the music heard from the speakers. Because it utilizes the resonance of the body, particularly the bones, a sense of realism can be felt not only through the ears but through the entire body. In the embodiment, the following configuration is provided to efficiently resonate the body.

Returning to FIG. 1, the signal generating device 10 has a first filter 20a, a second filter 20b, a first signal generating unit 22a, and a second signal generating unit 22b. The first filter 20a and the second filter 20b are collectively referred to as the filter 20. The first signal generating unit 22a and the second signal generating unit 22b are collectively referred to as the signal generating unit 22.

The vibrator 12, filter 20, and signal generator 22 may be provided in one set, or in two or more sets. For example, when only vibrations of one frequency, such as low frequency, are used, one set of these may be provided. When vibrations of three frequencies, such as low frequency, mid frequency, and high frequency, are used, three sets of these may be provided.

The first filter 20a extracts, from the input acoustic signal, for example, a component of 1500 Hz, which is the resonance frequency of the fourth thoracic vertebra, which is the first predetermined part of the human body, and supplies the extracted signal to the first signal generator 22a.

The second filter 20b extracts, for example, a 500 Hz component, which is the resonant frequency of the third lumbar vertebra, which is the second predetermined part of the human body, from the input acoustic signal, and supplies the extracted signal to the second signal generator 22b.

In other words, each of the multiple filters 20 extracts from the acoustic signal components of the resonant frequency of a different specific part of the human body. The filters 20 include, for example, bandpass filters that extract components of a specific frequency band centered on the resonant frequency.

The first signal generator 22a generates a first acoustic vibration signal that includes the reverberation signal of the signal extracted by the first filter 20a and from which the signal extracted by the first filter 20a has been removed, and supplies the generated first acoustic vibration signal to the first vibrator 12a.

The second signal generator 22b generates a second acoustic vibration signal that includes the reverberation signal of the signal extracted by the second filter 20b and from which the extracted signal has been removed by the second filter 20b, and supplies the generated second acoustic vibration signal to the second vibrator 12b.

In other words, each of the multiple signal generators 22 generates an acoustic vibration signal that includes the reverberation signal of the signal extracted by the corresponding filter 20 and from which the extracted signal has been removed, and supplies the generated acoustic vibration signal to the corresponding vibrator 12.

The first signal generating unit 22a has a first delay circuit 24a and a first reverb circuit 26a. The second signal generating unit 22b has a second delay circuit 24b and a second reverb circuit 26b. The first delay circuit 24a and the second delay circuit 24b are collectively referred to as the delay circuit 24. The first reverb circuit 26a and the second reverb circuit 26b are collectively referred to as the reverb circuit 26.

The delay circuit 24 delays the signal extracted by the filter 20 by a preset delay amount. This makes it possible to adjust the time difference between the sound waves transmitted from the sound output device 14 to the ear and the vibrations transmitted from the vibrator 12 to the human body. The delay circuit 24 may be omitted.

The reverb circuit 26 adds a reverb effect to the signal delayed by the delay circuit 24, and outputs an acoustic vibration signal. The reverb circuit 26 delays the output signal of the delay circuit 24 by a predetermined time and generates an attenuated reverberation signal, which is then added to the original signal, repeatedly outputting a signal of the same frequency as the output signal of the delay circuit 24 while gradually decreasing the amplitude. Since the reverb circuit 26 delays and attenuates the output signal of the delay circuit 24, the output acoustic vibration signal does not include the signal extracted by the filter 20. Therefore, it can be said that the reverb circuit 26 removes the signal extracted by the filter 20. Various known circuits can be used as the reverb circuit 26.

Figure 4 is a block diagram showing an example of the configuration of the signal generating unit 22 in Figure 1. Figure 4 shows an example in which the signal generating unit 22 is realized by digital signal processing. The delay circuit 24 delays the signal extracted by the filter 20 by n samples (n is a natural number).

The reverb circuit 26 includes an adder 40, a first gain section 42, a delay section 44, and a second gain section 46. The adder 40 adds the output signal of the delay circuit 24 and the output signal of the second gain section 46, and supplies the addition result to the first gain section 42. The first gain section 42 attenuates the output signal of the adder 40 with a first gain smaller than 1, and supplies the obtained signal to the delay section 44. The delay section 44 delays the output signal of the first gain section 42 by m samples (m is a natural number), and supplies the obtained signal to the vibrator 12 and the second gain section 46. The second gain section 46 attenuates the output signal of the delay section 44 with a second gain smaller than 1, and supplies the obtained signal to the adder 40. The first gain, the second gain, m, and n can be appropriately determined by experiment or simulation.

Figure 5 shows a schematic diagram of the relationship between the amplitude and time of the acoustic vibration signal output from the signal generating unit 22 in Figure 4. It is assumed that at time t0, a pulsed signal having a resonant frequency is supplied from the filter 20 to the signal generating unit 22. The acoustic vibration signal does not include the signal supplied from the filter 20 at time t0, i.e., the direct wave. When a predetermined period of time has elapsed from time t0, a reverberation signal is output from the reverberation circuit 26, and the amplitude of the reverberation signal gradually decreases over time. The amplitude of the acoustic vibration signal is smaller than the amplitude of the signal supplied from the filter 20 at time t0.

With the above configuration, the vibrator 12 arranged at a position corresponding to a predetermined part of the human body generates vibration based on an acoustic vibration signal including a reverberation signal of a signal of a resonant frequency of the predetermined part of the human body, so that reverberation is likely to occur in the predetermined part and the predetermined part is likely to resonate. That is, as shown in FIG. 5, when a 1500 Hz component is extracted from the acoustic signal at time t0, the first vibrator 12a repeatedly outputs the 1500 Hz vibration while gradually decreasing the amplitude after a predetermined period has elapsed. Therefore, a vibration reverberation occurs in the fourth thoracic vertebra of the user, and the fourth thoracic vertebra is likely to resonate. As shown in FIG. 5, when a 500 Hz component is extracted from the acoustic signal at time t0, the second vibrator 12b repeatedly outputs the 500 Hz vibration while gradually decreasing the amplitude after a predetermined period has elapsed. Therefore, a vibration reverberation occurs in the third lumbar vertebra of the user, and the third lumbar vertebra is likely to resonate. Therefore, compared to generating vibrations only from the direct waves output from filter 20 without using reverberation signals, bodily resonance is more easily induced, and a sense of realism and immersion can be achieved more effectively.

In addition, since the signal extracted by the filter 20, i.e., the direct wave, is removed from the acoustic vibration signal, the vibration generated by the vibrator 12 can be prevented from being heard as sound, particularly at relatively high frequencies. Furthermore, by using a reverberation signal, even if the vibration generated by the vibrator 12 travels through the air and reaches the user's ear, it becomes a blurred sound, making it harder to hear as sound compared to when vibration is generated only by direct waves. This makes it harder to disturb the positioning of the sound output from the acoustic output device 14.

As a result, it is possible to realize a more realistic audio experience that cannot be obtained with the audio output device 14 alone.

The time difference between the sound wave output from the sound output device 14 and the vibration output from the vibrator 12 can also be adjusted by a delay circuit 24 or the like. This allows for flexible adjustment according to individual preferences, further enhancing the sense of immersion. In addition, the resonant frequency extracted by the filter 20 and the output level from the vibrator 12 may be adjusted according to the individual's physique, weight, etc.

Here, the inventors recognized that, depending on the relationship between the distance between the two vibrators 12 and the frequency of the vibrations generated by the two vibrators 12, there is a possibility that the vibrations generated by each of the two vibrators 12 may interfere with each other in the human body. If the interference becomes too great, the user may feel unnecessary vibrations, or the vibrations may be canceled out, making it difficult to feel necessary vibrations.

The distance between the first and second oscillators 12a and 12b may satisfy a condition for suppressing interference in the human body between the vibrations generated by each of the two oscillators 12. Specifically, the distance between the two oscillators 12 is different from the product of the inverse of the difference in frequency between the two acoustic vibration signals supplied to the two oscillators 12 and the transmission speed of the vibration between the two oscillators 12. The transmission speed of the vibration is determined according to the material of the seat, etc.

When three or more vibration exciters 12 are provided, the distance between two of the multiple vibration exciters 12 satisfies the condition for suppressing interference in the human body between the vibrations generated by each of the two vibration exciters 12.

This helps prevent the user from feeling unnecessary vibrations or having difficulty feeling necessary vibrations due to large interference between the two vibration frequencies, thereby preventing a decrease in the sense of realism.

Specifically, the positions of the first and second oscillators 12a and 12b built into the seat 30 may be set at the design stage so as to satisfy the above conditions. Alternatively, the frequency of the acoustic vibration signal supplied to either the first oscillator 12a or the second oscillator 12b, i.e., the frequency of the passband of either the first filter 20a or the second filter 20b, may be set at the design stage so as to satisfy the above conditions.

The present invention has been described above based on an embodiment. This embodiment is merely an example, and it will be understood by those skilled in the art that various modifications are possible in the combination of each component and each processing process, and that such modifications are also within the scope of the present invention.

(First Modification)
The first modification is different from the embodiment in that the vibration delay is controlled when it is necessary to suppress vibration interference. The following describes each modification, focusing on the differences from the embodiment.

Figure 6 is a block diagram showing the configuration of a bodily acoustic system 1 of a first modified example. The signal generating device 10 further includes a control unit 28 in addition to the configuration of Figure 1. The control unit 28 controls the entire signal generating device 10.

The control unit 28 monitors the output signal of the filter 20, and when the amplitude of the output signal of the filter 20 becomes equal to or greater than a predetermined value, it determines that a resonant frequency component has been extracted. If the timing at which the resonant frequency component of the first predetermined portion is extracted by the first filter 20a is equal to the timing at which the resonant frequency component of the second predetermined portion is extracted by the second filter 20b, the control unit 28 controls the first signal generating unit 22a and the second signal generating unit 22b to delay one of the first acoustic vibration signal and the second acoustic vibration signal relative to the other.

In other words, for example, if an acoustic signal contains a 500 Hz component and a 1500 Hz component with equal timing, the control unit 28 differentiates the timing at which the 500 Hz vibration is generated by the first oscillator 12a from the timing at which the 1500 Hz vibration is generated by the second oscillator 12b. Since the timing at which the vibrations are generated by each of the two oscillators 12 differs, interference between these vibrations can be suppressed. The distance between the two oscillators 12 does not need to satisfy the conditions for suppressing interference described above.

In addition, for example, when three or more vibrators 12 are provided, if the timing at which a certain resonant frequency component is extracted by a certain filter 20 is equivalent to the timing at which another resonant frequency component is extracted by another filter 20, the signal generating unit 22 to which the certain resonant frequency component is supplied delays the acoustic vibration signal relative to the acoustic vibration signal generated by the signal generating unit 22 to which the other resonant frequency component is supplied.

(Second Modification)
In a second variant, an early reflection signal is also added to the acoustic vibration signal as a reverberation signal.
FIG. 7 is a schematic diagram showing the relationship between the amplitude and time of the acoustic vibration signal of the second modified example. The acoustic vibration signal includes an early reflection signal S2 and a late reverberation signal S1, both of which are reverberation signals. The amplitude of the acoustic vibration signal is smaller than the amplitude of the signal supplied from the filter 20 at time t0. The late reverberation signal S1 is generated by the reverberation circuit 26 of FIG. 4. The early reflection signal S2 is a signal that is generated at an earlier timing than the late reverberation signal S1. The early reflection signal S2 can be generated by a known technique. For example, the signal generating unit 22 may have an early reflection signal generating unit configured with an FIR (Finite Impulse Response) filter, and may generate the early reflection signal S2 by passing the output signal of the filter 20 through the early reflection signal generating unit, and may add the generated early reflection signal S2 to the output signal of the reverberation circuit 26.

This variant can generate a different body resonance than the embodiment, providing a different acoustic experience.

(Third Modification)
The third modification is different from the embodiment in that the acoustic vibration signal also includes an attenuated direct wave.
Fig. 8 is a block diagram showing the configuration of a bodily acoustic system 1 according to a third modification. The first signal generating unit 22a further includes a first attenuation circuit 50a in addition to the configuration shown in Fig. 1. The second signal generating unit 22b further includes a second attenuation circuit 50b in addition to the configuration shown in Fig. 1.

The first attenuation circuit 50a attenuates the signal extracted by the first filter 20a with a third gain smaller than 1, and adds the attenuated signal to the output signal of the first reverb circuit 26a. As a result, the first signal generator 22a generates a first acoustic vibration signal that includes a reverberation signal of the signal extracted by the first filter 20a and is an attenuated version of the extracted signal.

The second attenuation circuit 50b attenuates the signal extracted by the second filter 20b with a third gain smaller than 1, and adds the attenuated signal to the output signal of the second reverb circuit 26b. As a result, the second signal generator 22b generates a second acoustic vibration signal that includes a reverberation signal of the signal extracted by the second filter 20b and is an attenuated version of the extracted signal.

Although not shown in the figure, the acoustic vibration signal of this modified example includes an attenuated signal supplied from filter 20 at time t0 in the waveform of Figure 5, i.e., an attenuated direct wave.

Even in this modified example, by appropriately setting the third gain, it is possible to prevent the vibrations generated by the vibrator 12 from being heard as sound at relatively high frequencies.

(Fourth Modification)
The fourth modification is different from the embodiment in that some of the vibration exciters 12 are selected in response to a user from among the plurality of vibration exciters 12. The configuration of the sensible acoustic system 1 is based on FIG.

For example, multiple vibration exciters 12 are built into the backrest of the seat in the direction from the head to the waist of the seated user. The user seated in the seat is imaged using a camera in the vehicle cabin, and the control unit 28 recognizes a specific part of the user's body, such as the shoulder, from the image, and selects a predetermined position and a predetermined number of vibration exciters 12 from the multiple vibration exciters 12 based on the position of the recognized specific part. The signal generating device 10 supplies an acoustic vibration signal to the selected vibration exciters 12. For example, when generating vibrations of 1500 Hz and 500 Hz, the control unit 28 may select the vibration exciter 12 corresponding to the image-recognized position of the user's shoulder as the first vibration exciter 12a, and select the vibration exciter 12 corresponding to the waist position as the second vibration exciter 12b. This makes it easier to apply vibrations of a predetermined frequency to more appropriate body positions according to the size of the body.

Alternatively, each user may specify in advance the position of the vibration exciter 12 that will provide the desired acoustic experience, and register information for identifying the vibration exciter 12 in a memory unit (not shown) of the sensible acoustic system 1. When the user sits down in the seat, the user selects the registered information. The control unit 28 selects a predetermined number of vibration exciters 12 from among the multiple vibration exciters 12 in accordance with the selected information. By simply performing a selection operation, the user can easily achieve an acoustic experience that suits them.

In this modified example, if the distance between two of the selected multiple vibration exciters 12 does not satisfy the above-mentioned condition for suppressing interference, the control unit 28 may execute at least one of the following processes: selecting another vibration exciter 12 in place of one of the two vibration exciters 12; and changing the frequency of the passband of the filter 20 corresponding to one of the two vibration exciters 12. In this case, for example, the control unit 28 may select the vibration exciter 12 adjacent above or below the vibration exciter 12 as the first vibration exciter 12a in place of the vibration exciter 12 corresponding to the position of the user's shoulder. The control unit 28 may change the frequency of the passband of the filter 20 corresponding to the first vibration exciter 12a corresponding to the position of the user's shoulder to, for example, 1450 Hz. This can suppress interference and reduce the decrease in realism.

(Other Modifications)
When the sensible acoustic system 1 is used indoors, the vibrator 12 may be built into the backrest of a sofa or chair, or into a mattress on which a user can lie.

The acoustic signal may be supplied to the sensible acoustic system 1 from an electronic device such as a server, a game machine, a disc recorder, a disc player, a television device, or a personal computer.

At least two of the above modifications may be combined. The new modification resulting from the combination will have the combined effects of each of the modifications.

1...tissue-sensing acoustic system, 10...signal generating device, 12...vibrator, 12a...first vibrator, 12b...second vibrator, 20...filter, 20a...first filter, 20b...second filter, 22...signal generating unit, 22a...first signal generating unit, 22b...second signal generating unit, 24...delay circuit, 24a...first delay circuit, 24b...second delay circuit, 26...reverb circuit, 26a...first reverb circuit, 26b...second reverb circuit.

Claims (5)

a filter for extracting a component of a resonant frequency of a predetermined part of a human body from an input acoustic signal;
a signal generating unit that generates an acoustic vibration signal including a reverberation signal of the signal extracted by the filter, the acoustic vibration signal being removed or attenuated;
a vibration exciter that is disposed at a position corresponding to the predetermined portion and generates vibrations based on the acoustic vibration signal generated by the signal generating unit;
A bodily sensation acoustic system comprising: A plurality of sets of the filter, the signal generating unit, and the vibrator are provided,
Each of the plurality of vibrators is disposed at a position corresponding to a different predetermined part of the human body,
Each of the plurality of filters extracts a resonant frequency component of a different predetermined part of the human body from the acoustic signal;
a distance between two of the plurality of vibration exciters satisfies a condition for suppressing interference in the human body between vibrations generated from the two vibration exciters;
2. The bodily sensation acoustic system according to claim 1. The distance between the two vibrators is different from the product of the inverse of the difference between the frequencies of the two acoustic vibration signals supplied to the two vibrators and the transmission speed of the vibration between the two vibrators.
3. The bodily sensation acoustic system according to claim 2. A plurality of sets of the filter, the signal generating unit, and the vibrator are provided,
Each of the plurality of vibrators is disposed at a position corresponding to a different predetermined part of the human body,
Each of the plurality of filters extracts a resonant frequency component of a different predetermined part of the human body from the acoustic signal;
When a timing at which a certain resonant frequency component is extracted by a certain filter is equivalent to a timing at which a different resonant frequency component is extracted by a different filter, the signal generating unit to which the certain resonant frequency component is supplied delays the acoustic vibration signal relative to the acoustic vibration signal generated by the signal generating unit to which the different resonant frequency component is supplied.
2. The bodily sensation acoustic system according to claim 1. A signal generating device that supplies an acoustic vibration signal to a vibrator that is disposed at a position corresponding to a predetermined part of a human body and generates vibration based on the acoustic vibration signal,
a filter that extracts a component of the resonant frequency of the predetermined part from an input acoustic signal;
a signal generating unit that generates the acoustic vibration signal including a reverberation signal of the signal extracted by the filter, the reverberation signal being removed or attenuated;
A signal generating device comprising:

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