WO2021084899A1

WO2021084899A1 - Headphone device

Info

Publication number: WO2021084899A1
Application number: PCT/JP2020/033345
Authority: WO
Inventors: 勇小泉
Original assignee: 勇小泉
Priority date: 2019-10-27
Filing date: 2020-09-02
Publication date: 2021-05-06
Also published as: JP6687275B1; JP2021069066A

Abstract

[Problem] To provide a headphone device capable of effectively transmitting indirect sound suitable for reproduction of a sound field to the eardrums by utilizing the function of the auricles. [Solution] A headphone device equipped with a pair of housings, said device being characterized in that a sound delay conduit 4 (hereinafter referred to as "delay conduit") of a predetermined length is provided inside each of the housings 3 of the headphone device, some of the sound waves emitted from speakers of the headphone device enter each delay conduit 4 from one end 4a of said delay conduit 4 and the entering sound waves are emitted from the other end 4b of said delay conduit 4, and the other ends 4b are positioned such that the sound waves emitted therefrom reach the R region of the conchae from the direction of the antihelixes of the auricles when the headphone device is mounted on the auricles.

Description

Headphone device

The present invention relates to a headphone device, and more particularly to a headphone device that enables forward localization of a sound field by adding an indirect sound.

In the headphone device in general, as a headphone device capable of hearing sound localized in the front, for example, the one shown in the following Patent Document 1 is known.
That is, the headphone device described in Patent Document 1 includes a sounding body dedicated to front sound (hereinafter referred to as "speaker") and a speaker dedicated to rear sound in one housing, and the sound radiation axis of the speaker dedicated to front sound is an ear. The anterior sound dedicated speaker is arranged so that it faces the direction of the concha cavity from the bead direction, and the posterior sound dedicated speaker is arranged so that the sound radiation axis of the posterior sound dedicated speaker faces the direction of the concha cavity from the opposite wheel direction. By doing so, the front sound is localized in the front and the rear sound is localized in the rear so that the sound can be heard.

However, in the headphone device of Patent Document 1, a speaker dedicated to the front sound and a speaker dedicated to the rear sound must be provided independently, and the sound source also needs to prepare the front sound and the rear sound separately, which is costly. High was inevitable. Further, if the diameter of the speaker used is increased, sound waves are radiated to the entire auricle, and there is a problem that the front sound and the rear sound cannot be clearly separated.
Further, as a solution to this problem by a simple method, Patent Document 2 discloses a method in which anterior localization is realized by utilizing the function of the auricle.

Japanese Unexamined Patent Publication No. 2005-117594 JP-A-2017-103604

However, the method of Patent Document 2 is not yet sufficient. The present invention has been made in view of the above circumstances, and provides a headphone device capable of effectively transmitting indirect sound suitable for sound field reproduction to the eardrum by utilizing the auricle function. With the goal.

The present invention relates to a headphone device having speakers in a pair of housings, respectively. The object of the present invention is to provide sound conduction delay tubes (hereinafter, "delay tubes") having a predetermined length in the left and right housings of the headphone device. A part of the sound radiated from the speaker of the headphone device is taken into the delay tube from one end of the delay tube, and the taken-in sound is radiated from the other end of the delay tube. At the other end, the sound radiated from the other end reaches the R region of the instep from the opposite ring direction of the earphone when the headphone device is attached to the earphone. Achieved by a headphone device characterized by being located in position.

Further, another invention of the present invention is a headphone device each provided with a speaker (hereinafter referred to as "main speaker") in a pair of housings, and the headphone device has a sub-speaker and a sub-speaker in the left and right housings, respectively. A delay signal generation unit is provided, and the delay signal generation unit includes a signal delay unit including one or two or more delay circuits, and a mixing amplifier that mixes and amplifies each delay signal output from the signal delay unit. Further, a part of the signal for driving the main speaker of the headphone device is delayed for a predetermined time by the delay signal generation unit on the same channel side as the main speaker, and the power supply for driving them is provided. The delayed processed signal drives the sub-speaker on the same channel side as the main speaker, and each main speaker is in a state in which the sound wave radiated from each main speaker is attached to the ear canal of the headphone device. In a state in which the headphone device is attached to the ear canal by arranging the sub-speakers at a position so as to reach the F region of the ear canal and radiating sound waves from the sub-speakers. The speaker is arranged at a position so as to reach the R region of the instep from the opposite ring direction of the ear.

With the headphone device having the above configuration, it is possible to provide a headphone device capable of front localization and high sound quality.

It is a figure which shows the example of the 1st Embodiment of the headphone apparatus of this invention. It is sectional drawing which shows the structure of a delay tube. It is a figure which shows the relative positional relationship of a speaker of a headphone apparatus, a delay tube, and a pinna. It is a figure which shows the example of the 2nd Embodiment of the headphone apparatus of this invention. It is a figure which shows the relative positional relationship of a speaker, a delay tube straddling the head, and a pinna. It is a rough image diagram of the sound image localized forward. It is a figure which shows the structure (A) of the human pinna, the position (B) of F region and R region. It is a figure for demonstrating a direct sound and an indirect sound in a three-dimensional sound field. It is a figure which shows the example of the 3rd Embodiment of the headphone apparatus of this invention. It is a figure which shows the relative positional relationship between a secondary speaker and the R region of auricle. It is a block diagram of 1st Example of 3rd Embodiment of the headphone apparatus of this invention. It is a block diagram of the 2nd Example of the 3rd Embodiment of the headphone apparatus of this invention. It is a block diagram of the delay signal generation part of the 3rd Embodiment of the headphone apparatus of this invention. It is a block diagram of the 3rd Example of the 3rd Embodiment of the headphone apparatus of this invention. It is a block diagram of the composite delay signal generation part of the 3rd Embodiment of the headphone apparatus of this invention. It is a block diagram of the modification of the 1st Example of the 3rd Embodiment of the headphone apparatus of this invention. It is a block diagram of the modification of the 2nd Example of the 3rd Embodiment of the headphone apparatus of this invention. It is a modification block diagram of the 3rd Example of the 3rd Embodiment of the headphone apparatus of this invention.

Hereinafter, the headphone device capable of front localization according to the present invention will be described with reference to the drawings. Before that, first, in order to explain the mechanism of forward localization that the present inventor has empirically learned, the basic matters will be described.

FIG. 7 is a diagram showing the structure of the human pinna, FIG. 7 (A) shows the names of each part, and FIG. 7 (B) shows whether the human is a front sound or a rear sound. It is a figure for demonstrating the region of the auricular cavity which is a sound receiving region which plays an important role in distinguishing.
Now, in the concha cavity, the region 703 close to the tragus 701 is referred to as "R region", and the region 704 close to the pair ring 702 is referred to as "F region".

The present inventor has learned from previous experience that the R region 703 is a region that collects the rear sound and the F region 704 is a region that collects the front sound, and has confirmed by experiments.
The sound waves radiated from the direction of the helix to the concha of the ear (hereinafter simply referred to as "from the direction of the annulus to the concha") are based on the anatomical three-dimensional structure if wraparound is not taken into consideration. Therefore, it mainly reaches the R region.
It is considered that the sound wave is blocked by the pair of wheels in the F region immediately connected to the pair of wheels, and the F region is, so to speak, in the shadow of the pair of wheels.

Next, the path until the sound wave emitted from the sound source reaches the human ear will be described with reference to FIG.
In FIG. 8, 801 is a view of the human head from above, and the direction of the nose 802 is forward. Now, the sound wave 804 radiated from the left sound source 803 (the right sound source is omitted) of the stereo sound source reaches the left ear as a direct sound and is collected in the F region of the instep. On the other hand, the sound wave 805 radiated from the left sound source 803 is reflected by the

walls

805a, 805b, and 805c, reaches the left ear as an indirect sound (delayed sound), and is projected onto the R region of the concha.

Further, the sound wave 806 radiated from the left sound source 803 is reflected by the

walls

806c, 806b, and 806a, reaches the right ear as an indirect sound (of the left sound source), and is projected onto the R region of the concha of the right ear. To. Similarly, although not shown, the indirect sound of the right sound source (not shown) is collected in the R region of the human left ear in the figure.
Further, although not shown, the direct sound of the right sound source is collected in the F region of the human right ear, and the indirect sound of the right sound source and the left sound source is collected in the R region.

Perceiving a sense of forward localization by indirect sound and direct sound is due to the complex information of visual information and direct sound and indirect sound in the process of development after the birth of the human brain. It is thought that they are stacked and integrated in the auditory center of the brain, and the perception of spatial position information based on information from sound is stored in a database and recognized.
As described above, if the direct sound is radiated to the F region and the indirect sound is radiated to the R region, it is considered to be recognized as anterior localization in the auditory center.
Therefore, it is considered that the more indirect sounds, the more accurately the position information of the sound source in the brain can be extracted.

Next, the headphone device 1 according to the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment, and housings 3 for storing headphone speakers (hereinafter, simply referred to as “speakers”) (hereinafter, simply referred to as “speakers”), which are not shown, are provided on the left and right sides via a headband 2.
A spiral delay tube 4 is mounted on the housing 3, and a sound collecting portion 4a is formed at one end of the delay tube 4 and is installed so as to be located in an arbitrary space above the speaker. To. Further, at the other end of the delay tube 4, a radiation section 4b is formed in which sound is collected by the sound collecting section 4a and the delayed sound wave is emitted through the delay tube 4. Then, as shown in FIG. 3 described later, the radiating portion 4b is arranged at a position where the sound wave is radiated from the anti-wheel direction to the R region of the ear canal. The sound radiated through the delay tube 4 acts as an indirect sound and is superimposed on the direct sound from the speaker to enable forward localization. In order to adjust the sound wave transmission time, the delay tube is molded in a spiral shape, and the delay time can be adjusted by adjusting the length.

FIG. 2 is a cross-sectional view when the delay tube 4 is linear for explanation. If the sound collecting unit 4a is provided at the end of the delay tube 4 that functions as the sound wave input end, the sound wave can be collected more effectively and function as the sound wave input end. The shape of the sound collecting portion 4a is, for example, a parabolic shape, and if a reflector 4c is arranged at the focal point thereof, the sound wave can be reflected and the sound wave can be effectively introduced into the delay tube. By doing so, it becomes possible to effectively transmit the sound wave to the sound wave emitting unit 4b. Then, the other end can function as a sound wave emitting unit 4b to radiate a delayed indirect sound.

FIG. 3 is a diagram showing a relative positional relationship between the speaker 5, the delay tube 4, and the pinna. The sound wave radiated from the speaker 5 enters the sound collecting portion 4a (of the delay tube 4) provided in an arbitrary space above the speaker, passes through the delay tube 4, and is transmitted from the radiating portion 4b to the pair of rings of the left ear. It is shown that the radiation unit 4b is installed at a position where it is radiated from the direction toward the R region of the ear canal. The direct sound radiated from the speaker 5 reaches the F region of the instep.

FIG. 4 shows a second embodiment of the headphone device according to the present invention, and a difference from the first embodiment is a sound wave radiated from a speaker of a channel on the left side of the drawing (referred to as “right channel”). A second delay tube 7 is provided for collecting the sound wave and introducing it into the housing 3 of the channel on the right side of the drawing (referred to as “left channel”) to radiate the sound wave. Since the second delay tube 7 straddles the head through the inside of the headband 2, it will be referred to as a "head straddling delay tube". The structure of the head straddling delay tube 7 is the same as that of the delay tube 4 shown in FIG. That is, as shown in FIG. 4, the sound wave radiated from the right channel speaker (not shown) is collected by the sound collecting unit 7a, introduced into the housing 3 of the left channel through the head straddling delay tube 7, and radiated. It is designed to radiate from part 7b.

Similarly, the sound wave radiated from the left channel speaker (not shown) is collected by the sound collecting unit 6a, introduced into the housing 3 of the right channel through the head straddling delay tube 6, and radiated from the radiating unit 6b. It has become. Other than that, it is the same as that of the first embodiment.
Explaining this effect in contrast to FIG. 8 (the left channel will be described), the direct sound 804 from the left sound source in FIG. 8 is the direct sound from the speaker of the left channel in FIG. 4, and the left in FIG. The indirect sound 805 from the sound source is the indirect sound radiated from the radiation unit 4b of the left channel in FIG.

Further, although not shown in FIG. 8, the indirect sound of the right sound source also reaches the left ear from the rear side, and this indirect sound is radiated from the radiating portion 7b of FIG. 4 (of the right channel). ) It is an indirect sound.
The indirect sound 806 from the left sound source in FIG. 8 is the indirect sound of the left channel radiated from the radiation unit 6b of the right channel in FIG.
It was confirmed in the experiment that the anterior localization effect was further increased by the configuration in this way as compared with the first embodiment.
Further, in FIG. 4, the head straddling

delay tubes

6 and 7 are connected to the other housing through the inside of the headband 2, but the head straddling

delay tubes

6 and 7 do not necessarily have to straddle the head, for example, the chin. Needless to say, it may be straddled under the bottom or behind the neck.

FIG. 5 is a diagram showing the relative positional relationship between the speaker 5, the delay tube 4, the head straddling

delay tubes

6 and 7, and the pinna. The description of the parts common to FIG. 3 will be omitted.
The sound wave radiated from the speaker 5 on the right channel enters the sound collecting portion 7a of the head straddling delay tube 7, passes through the head straddling delay tube 7 and enters the left channel, and the pair of rings of the left ear from the radiating portion 7b. It is shown that the radiation portion 7b is installed at a position where the radiation portion 7b is radiated from the direction toward the R region of the ear canal.
Similarly, the sound wave radiated from the left channel speaker 5 enters the sound collecting portion 6a of the head straddling delay tube 6, passes through the head straddling delay tube 6 and enters the right channel, and enters the right channel from the radiation portion 6b to the right ear. It is shown that the radiating portion 6b is installed at a position where the radiating portion 6b is radiated from the direction of the opposite wheel toward the R region of the ear canal.
The direct sound radiated from the speaker 5 reaches the F region of the instep.

FIG. 6 shows an image of sound field localization when the headphone device according to the present invention is used. In a normal headphone device, the sound field is localized in the head, but in the headphone device according to the present invention, it has been empirically confirmed that the sound field is localized in the front of the head as shown in the figure. However, it is empirically known that the degree of effect varies from person to person and is related to the shape of the pinna. Ideally, a better anterior localization effect can be obtained by adjusting the installation positions of the

radiation portions

4b and 6b (4b and 7b in the left channel) according to the shape of the individual pinna.
The headphone device according to the present invention can obtain a forward localization effect not only on a stereo sound source but also on a monaural sound source.

FIG. 9 shows a third embodiment of the headphone device according to the present invention, in which the first and second embodiments use a delay tube (including a head straddle delay tube) to create an indirect sound. On the other hand, the third embodiment includes a delay signal generator that electrically delays the audio signal input to the headphone device instead of the delay tube, and emits the generated delay signal as indirect sound. The feature is that it further includes 8. In the third embodiment, there are a total of three patterns including the two modified examples, and the configurations of the delay signal generation units are different from each other. This will be described later.

FIG. 10 shows the relative positional relationship between the sub-speaker 8 and the R region of the pinna when the headphones are worn on the ear. The sub-speaker 8 may be installed at a position where the sound wave radiated from the sub-speaker 8 reaches the R region of the auricle while the headphones are worn.

FIG. 11 is a block diagram of a first embodiment of the third embodiment of the headphone device of the present invention. The first embodiment is characterized in that the sub-speaker 8 of the same channel is made to input a signal obtained by delaying the input signal of the same channel.
That is, the input signal of the left channel is input as a direct sound to the main speaker 5 of the left channel, the input signal of the left channel is delayed by the delay signal generation unit 9 to the sub speaker 8 of the left channel, and the indirect sound of the left channel is recorded. To be entered as. The same applies to the right channel. The delay signal generation unit 9 will be described later.
This effect will be described with reference to FIG. The sound shown by 804 in FIG. 8 (direct sound) corresponds to the sound radiated from the main speaker 5 of the left channel, and the sound shown by 805 of FIG. 8 (indirect sound) radiates from the sub speaker 8 of the left channel. Corresponds to the sound being played.

FIG. 12 is a block diagram of a second embodiment of the third embodiment of the headphone device of the present invention. The second embodiment is characterized in that the sub-speaker 8 of one channel inputs a signal obtained by delaying the input signal of the opposite channel.
That is, the input signal of the left channel is input as a direct sound to the main speaker 5 of the left channel, the input signal of the right channel is delayed by the delay signal generation unit 9 to the sub speaker 8 of the left channel, and the indirect sound of the right channel is delayed. To be entered as.

Further, the input signal of the right channel is input as a direct sound to the main speaker 5 of the right channel, the input signal of the left channel is delayed by the delay signal generation unit 9 to the sub speaker 8 of the right channel, and the indirect sound of the left channel is input. To be entered as.
This effect will be described with reference to FIG. The sound shown by 804 in FIG. 8 (direct sound) corresponds to the sound radiated from the main speaker 5 of the left channel, and the sound shown by 806 of FIG. 8 (indirect sound) radiates from the sub speaker 8 of the right channel. Corresponds to the sound being played.

FIG. 13 is a diagram showing a configuration of a delay signal generation unit 9 according to a third embodiment of the headphone device of the present invention.
The delay signal generation unit 9 includes a signal delay unit 9a including n (n = 1, 2, ..., N) delay circuits 1_1 to 1_n, a mixing amplifier 9b that mixes and amplifies the output of each delay circuit, and them. It is equipped with a power source 9c to drive.
The input audio signal is delayed for a predetermined time by the signal delay unit 9a, mixed and amplified by the mixing amplifier 9b, and output.

Further, each delay circuit 1_1 to 1_n is set so that the delay time is different. The reason for providing a plurality of delay circuits is as follows. In other words, in a normal room or hall (where reverberation is generated), reflected sound from innumerable directions is heard, and human beings hear this and feel the size of the room and the comfort of the sound of the hall, but they are reflected. Depending on the location, the time it reaches the human ear may vary. In other words, you will hear multiple indirect sounds with different delay times. In order to artificially create this, it is possible to create a simulated acoustic space by providing n delay circuits, mixing the outputs, and outputting them from the sub-speaker.
Furthermore, if the reverberation (delay time) of a famous hall in the world, for example, Carnegie Hall, is measured and set to the delay time, the sound close to that hall can be heard.
It should be noted that the effective delay time has nothing to do with the shape of the individual ear. This is because the delay time causes spatial perception by collating with the database accumulated in the auditory center in the brain.

For example, a DSP (Digital Signal Processor) can be used for signal delay processing. Further, a dedicated delay circuit may be used. Higher sound quality can be obtained by increasing the number of n of n types of delay times.
The power supply 9c may be a primary battery or a secondary battery (lithium ion battery, etc.) provided in the housing, or a delay signal in the housing is generated from an external amplifier that drives the headphone device with a code different from the audio signal code. Power may be supplied to the unit.

The delay time of the delay signal generation unit 9 in the second embodiment is preferably set longer than the delay time of the delay signal generation unit 9 in the first embodiment. That is, the indirect sound of the reverse channel is considered to have a longer delay time than the indirect sound of the same channel.

FIG. 14 is a block diagram of a third embodiment of the third embodiment of the headphone device of the present invention.
This third embodiment is conceptually a combination of the first embodiment and the second embodiment described above.
That is, it is characterized in that the sub-speaker 8 in one channel is made to input a composite of a signal in which the input signal of the same channel is delayed and a signal in which the input signal of the opposite channel is delayed.

That is, the input signal of the left channel is directly input to the main speaker 5 of the left channel as a direct sound, and the input signal of the left channel (input 1) and the input signal of the right channel (input 2) are input to the sub speaker 8 of the left channel. Is input to the composite delay signal generation unit 10, each delay signal is generated, and a combined signal is input.
Further, the input signal of the right channel is directly input to the main speaker 5 of the right channel as a direct sound, and the input signal of the right channel (input 1) and the input signal of the left channel (input 2) are input to the sub speaker 8 of the right channel. Is input to the composite delay signal generation unit 10, each delay signal is generated, and a combined signal is input.
With this configuration, the direct sound of the same channel, the indirect sound of the same channel, and the indirect sound of the reverse channel are supplied into one channel, and the thickness of the sound is further deepened. The configuration of the composite delay signal generation unit 10 will be described below.

FIG. 15 is a block diagram of the composite delay signal generation unit 10 of the third embodiment of the third embodiment of the headphone device of the present invention.
The composite delay signal generation unit 10 has both the functions of the delay signal generation unit 9 in the first embodiment and the delay signal generation unit 9 in the second embodiment. That is, the first signal delay unit 9a for performing delay processing of the input signal (input 1) of the same channel and the second signal delay unit 9d for performing delay processing of the input signal (input 2) of the opposite channel. The mixing amplifier 9b that mixes and amplifies the delay signals output from the first signal delay unit 9a and the second signal delay unit 9d, and the power supply 9c that drives them are provided.
The second signal delay section 9d includes n (n = 1, 2, ..., N) delay circuits 2_1 to 2_n, but the difference from the first signal delay section 9a is the delay circuits 2_1 to 2_1 to n. The only point is that the delay time of 2_n is longer than the delay time of the delay circuits 1_1 to 1_n of the first signal delay unit 9a. The reason is as described above.

FIG. 16 is a block diagram of a modified example of the first embodiment of the third embodiment of the headphone device of the present invention. The only difference from the first embodiment of FIG. 11 is that the two delay signal generation units 9 are installed as signal delay units outside the housing. This signal delay unit may be built in a cable connecting the headphone device and the sound source drive amplifier (not shown), or may be built in the sound source drive amplifier. By doing so, the structure of the headphone body becomes simple.

FIG. 17 is a block diagram of a modified example of the second embodiment of the third embodiment of the headphone device of the present invention. The only difference from the second embodiment of FIG. 12 is that the two delay signal generation units 9 are installed as signal delay units outside the housing.
Further, FIG. 18 is a block diagram of a modified example of the third embodiment of the third embodiment of the headphone device of the present invention. The only difference from the third embodiment of FIG. 14 is that the two composite delay signal generation units 10 are installed as signal delay units outside the housing.

Although the description of the embodiment is finished above, the present invention is not limited to the above-described embodiment, and can be changed as long as the gist of the present invention is not impaired.
Further, it goes without saying that the configurations of the respective embodiments and operations described above can be implemented in any combination as long as they do not contradict each other.

1: Headphone device, 2: Headband, 3: Housing, 4: Sound conduction delay tube, 4a: Sound collecting part, 4b: Radiating part, 4c: Reflecting part, 5: (Main) speaker, 6: Head straddling delay Tube, 7: Head straddle delay tube, 8: Sub-speaker, 9: Delay signal generator, 9a: First signal delay section, 9b: Mixing amplifier, 9c: Power supply, 9d: Second signal delay section, 10 : Composite delay signal generator, 702: Pair, 703: R region, 704: F region

Claims

A headphone device having a speaker in each of a pair of housings, wherein sound conduction delay tubes (hereinafter referred to as "delay tubes") having a predetermined length are provided in the left and right housings of the headphone device, respectively. A part of the sound radiated from the speaker is taken into the delay tube from one end of the delay tube, and the taken-in sound is radiated from the other end of the delay tube.
The other end is arranged at a position where the sound wave radiated from the other end reaches the R region of the auricle from the opposite ring direction of the auricle when the headphone device is attached to the auricle. A headphone device characterized by being radiated.
A part of the sound wave of the speaker of one channel (hereinafter referred to as "A channel") of the headphone device is collected, and the collected sound wave is inside the housing of the other channel (hereinafter referred to as "B channel"). A first head straddling delay tube for introducing as indirect sound of A channel and a part of the sound wave of the speaker of the B channel are collected, and the collected sound wave is put in the housing of the A channel. It is further provided with a second head straddling delay tube for introducing as an indirect sound of the B channel, and is also provided.
A part of the sound wave radiated from the speaker of the A channel is taken into the first head straddling delay tube from one end of the first head straddling delay tube, and the captured sound wave is taken into the B channel. Radiates from the other end of the first head straddling delay tube installed in the housing of
A part of the sound wave radiated from the speaker of the B channel is taken into the second head straddling delay tube from one end of the second head straddling delay tube, and the captured sound wave is taken into the A channel. It radiates from the other end of the second head straddling delay pipe installed in the housing of the above.
At each other end of each head straddling delay tube, the sound wave radiated from the other end is the R region of the auricle from the opposite ring direction of the auricle in a state where the headphone device is attached to the auricle. The headphone device according to claim 1, wherein the headphone device is arranged so as to reach.
In the delay tube, a sound collector having a sound collecting function for collecting sound waves is formed at one end, and radiation having a radiation function for radiating the collected sound waves at the other end. As the vessel is formed,
The headphone device according to claim 1 or 2, wherein the sound collector is provided with a reflector for effectively introducing the captured sound wave into the delay tube.
A headphone device having speakers (hereinafter referred to as "main speakers") in a pair of housings, the headphone device having a sub-speaker and a delay signal generator in the left and right housings, respectively.
The delay signal generation unit includes a signal delay unit including one or more delay circuits, a mixing amplifier that mixes and amplifies each delay signal output from the signal delay unit, and a power supply that drives them. And, in addition
A part of the signal for driving the main speaker of the headphone device is delayed for a predetermined time by the delay signal generation unit on the same channel side as the main speaker, and the delayed processed signal is the same channel as the main speaker. While driving the sub-speaker on the side
Each of the main speakers is arranged at a position where the sound wave radiated from each of the main speakers reaches the F region of the auricle when the headphone device is attached to the auricle. Each of the sub-speakers is positioned so that the sound wave radiated from each of the sub-speakers reaches the R region of the auricle from the opposite wheel direction of the auricle when the headphone device is attached to the auricle. A headphone device characterized by being placed in.
A headphone device having a main speaker in each of a pair of housings, and the headphone device has a sub-speaker and a delay signal generator in the left and right housings, respectively.
The delay signal generation unit includes a signal delay unit including one or more delay circuits, a mixing amplifier that mixes and amplifies each delay signal output from the signal delay unit, and a power supply that drives them. And, in addition
A part of the signal for driving the main speaker of the headphone device is delayed for a predetermined time by the delay signal generation unit on the channel side opposite to the main speaker, and the delayed processed signal is opposite to that of the main speaker. While driving the sub-speaker on the channel side of
Each of the main speakers is arranged at a position where the sound wave radiated from each of the main speakers reaches the F region of the auricle when the headphone device is attached to the auricle. Each of the sub-speakers is positioned so that the sound wave radiated from each of the sub-speakers reaches the R region of the auricle from the opposite wheel direction of the auricle when the headphone device is attached to the auricle. A headphone device characterized by being placed in.
A headphone device having a main speaker in each of a pair of housings, and the headphone device has a sub-speaker and a composite delay signal generator in the left and right housings, respectively.
The composite delay signal generation unit includes a first signal delay unit having one or more delay circuits and a second signal delay unit having one or more delay circuits having a delay time longer than that of the delay circuit. A mixing amplifier that mixes and amplifies and outputs each delay signal output from the first signal delay unit and the second signal delay unit, and a power supply for driving them, and further
A part of the signal for driving the main speaker of the A channel of the headphone device is delayed by the first signal delay unit of the composite delay signal generation unit on the A channel side, and the main speaker of the B channel is further processed. A part of the signal to be driven is delayed by the second signal delay unit of the composite delay signal generation unit on the A channel side, and the delayed processed signals are mixed and amplified to obtain the signal of the A channel. Drives the secondary speaker and
A part of the signal for driving the main speaker of the B channel of the headphone device is delayed by the first signal delay unit of the composite delay signal generation unit on the B channel side, and further, the main of the A channel. A part of the signal for driving the speaker is delayed by the second signal delay unit of the composite delay signal generation unit on the B channel side, and the delayed processed signals are mixed and amplified to obtain the B channel. While driving the sub-speaker
Each of the main speakers is arranged at a position where the sound wave radiated from each of the main speakers reaches the F region of the auricle when the headphone device is attached to the auricle. Each of the sub-speakers is positioned so that the sound wave radiated from each of the sub-speakers reaches the R region of the auricle from the opposite wheel direction of the auricle when the headphone device is attached to the auricle. A headphone device characterized by being placed in.