JP2003230188A - Method for suppressing noise generated from earphones, earphones, noise suppressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reproduce a sound approximate to that from a sound source by removing static electricity generated in a conductor by irradiating it with negative ions thereby reducing noise. <P>SOLUTION: A basic material 1 of synthetic rubber is admixed with powdery ceramics and kneaded. The basic material 1 being used on the apparatus side of a cord is prismatic and provided with a through hole 4 for passing a cord and a cut 5 thus constituting a noise suppressor 7, 8 (fig. b). The noise suppressor 7 is fitted to the vicinity of the plug 14 of an earphone body 10 and the noise suppressor 8 is fitted to the vicinity of a fork part 12 thus constituting an earphone 16 (fig. a). On the periphery of the noise suppressor 7, 8, 500-2,000 negative ions are generated per cm<SP>3</SP>and static electricity is removed through irradiation of negative ions thus suppressing noise being generated from static electricity. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of suppressing noise from an earphone, an earphone cord characterized by the noise suppressing method, and a noise suppressor attached to the earphone cord for use.

[0002]

2. Description of the Related Art In portable music reproducing devices (so-called CD players, MD players, cassette players), earphones such as earphones and headphones are usually used, assuming that they are used in a private space. Was there.

[0003]

In the earphones described above, since the cord is formed of a bundle of thin wires,
Compared to the one in the line of the book. The directions in which the analog audio signals (currents) flow become uneven, and static electricity is incidentally generated from the respective conductors. This static electricity affects the original audio signal and causes unavoidable noise. This will result in deterioration of sound quality.

When the distance from the diaphragm to the ear is long like a speaker (the vibrating air layer is thick), noise is relatively inconspicuous. However, like earphones and headphones, the diaphragm and the ear are separated from each other. If close, noise was noticeable.

Various filters have been proposed for reducing such noise, but they have not been effective means.

[0006]

According to the present invention, however, incident static electricity is removed by irradiating noise generated by interference of static electricity or the like with negative ions.
Noise can be suppressed.

That is, according to the present invention, in an earphone in which a voice generating unit and a plug are connected by a cord, at least one of the voice generating unit, the plug and the cord is irradiated with negative ions. To suppress noise from other types. In the above, the negative ion is 1
This is a method for suppressing noise from earphones that emits 500 to 2000 pieces per cubic cm.

According to another aspect of the invention, the cord has a sound generating portion at one end and a plug for connecting the other end to a reproducing device,
The earphones are characterized in that at least an end portion of the cord on the plug side and / or an end portion of the sound generating portion is provided with negative ion generating means for generating negative ions toward the cord.

According to another aspect of the invention, the cord has a sound generating portion at one end and a plug for connecting the other end to a reproducing device,
The earphones are characterized in that powdery negative ion generating means for generating negative ions are embedded in at least one non-conductive material portion of the cord, the sound generating portion and the plug.

Another invention is characterized in that a ceramic body for generating negative ions is embedded in a base material, and a through hole through which a cord of earphones can be inserted is formed in the base material. It is a tool. In the above, the noise is formed by forming a base from a flexible resin material, forming a notch communicating with the through hole in the base, and forming a protrusion for holding cords on the hole wall of the through hole. It is a restraint tool. Further, it is a noise suppressor in which a ceramic material that generates negative ions is kneaded into a resin material and solidified to form a base.

The above-mentioned earphones refer to devices such as earphones and headphones that produce sound by vibrating the diaphragm near the listener's ears.

Further, the non-conductive portion mentioned above is a portion other than a portion (conductor) for transmitting an electric signal, and usually,
It is made of synthetic resin made of an electrical insulator.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION (1) The present invention is a method for suppressing noise from a sound transmitted from a diaphragm of an earphone to an ear by irradiating a cord of the earphone with negative ions.

It is considered that the irradiation of negative ions can remove the accompanying static electricity generated from the conductive wire as described above.

Further, it is known that when negative ions are applied at the molecular level, the vibration of the molecule is suppressed and the softening point is raised, and it is also used in polyethylene processing and the like. Using this principle, the lead wire 1 of the cord of earphones
By irradiating one wire with negative ions, the fluctuation of copper atoms in the conductor wire is suppressed, so the fluctuation of the electric signal (minus electron) passing therethrough is also reduced, and more faithful sound reproduction is possible. It is considered to be.

(2) Further, it is considered more effective to irradiate the negative ions with the entire length of the cord, but it is not realistic and irradiation of a part of the cord is also possible.
In this case, it is desirable to irradiate at least two places.

When irradiating at two points, one point is immediately after the cord regenerator, and the other point is near the earphones (diaphragm) of the cord (for example, facing the left and right diaphragms, and the cord is Irradiate at the part just before it splits into two. This is because the effect of suppressing noise over the entire line cannot be expected only by irradiation with negative ions immediately after the first regenerator, which is the starting point, so that the effect can be expected efficiently.

At this time, when the total irradiation amount of negative ions to be irradiated in the entire cord is determined, it is expected that a higher noise suppressing effect can be expected by allocating a larger number of devices and a smaller diaphragm side. , It has been revealed by experiments. Further, in general, for irradiation, noise suppression tools and other means must be taken, and since weight is involved, increasing the weight of the diaphragm side has harmful effects such as "obstacle" and "heavy".
It is not suitable for handling, and some weight increase is acceptable on the equipment side.

(3) Further, the dose of negative ions is
Depending on the length of the cord, in the case of a typical cord length of about 100 cm, 1 cubic c around the negative ion generator
500 to 2000 pieces are desirable per m. here,
With 500, the noise suppression effect cannot be expected. Also,
It is difficult to obtain a material that produces more than 2000 negative ions in its natural state, and minerals that generate a large amount of radioactivity may simultaneously generate radioactivity that adversely affects the human body. If used for a long time, the radioactivity may be harmful, so 2000 or less is preferable.

(4) In the earphones of the present invention, the noise suppressing means is attached to at least two locations on the device side and the diaphragm side of the cord of the earphones.

As the noise suppressing means, it is preferable to use noise suppressing tools 7 and 8 described later (FIGS. 1 and 2), but other noise suppressing means can also be used.

For example, the cord 1 is formed of a flexible thin plate or sheet and has the negative ion generating means 25.
It can also be wrapped around 1 (Fig. 6).

Further, it is also possible to apply a paint capable of irradiating negative ions to the outside of the cord of the earphones. In this case, in this case, for example, it is conceivable to mix the paint with a ceramic powder that generates negative ions.

Further, the insulating coating itself for coating the conducting wire of the cord of the earphones can be used as the negative ion generating means. In this case, for example, it is conceivable to knead in advance a ceramic powder that generates negative ions into the synthetic resin forming the insulating coating.

(5) The noise suppressor of the present invention is constructed by providing a through hole through which a cord is inserted in the axial direction of a quadrangular prism and a notch communicating with the through hole in the axial direction. The base material that constitutes the noise suppressor is made of synthetic resin that is flexible enough to open the notch, and is mixed with ceramic powder that can be irradiated with negative ions (FIG. 2).

[0026]

[Embodiment 1] An embodiment of a noise suppressor and an earphone according to the present invention will be described with reference to FIGS.

[1] Embodiments of noise suppressors 7 and 8

A powdery ceramic body is kneaded and mixed into a base material 1 made of a synthetic rubber material having a certain degree of flexibility. As a ceramic body, for example, "Lasca de i
on (Lasca de Aeon, manufactured by DS Trade Co., Ltd.) "is used. "Lascade ion" is a component that contains amphibole, barley stone, and a trace amount of rare earth as the main components and does not contain tourmaline.

The base material 1 used on the device side of the cord has a square bottom surface 2 with a side length D (= 12 mm) and a prism shape with a height (length) L ₁ (= 12 mm). A through hole 4 for inserting the cord is formed in the height direction with an outer shape in which the ridgelines 3 and 3 are chamfered along the depth direction. Further, a notch 5 is formed along the length direction of the base 1 so as to connect the surface of the machine body and the through hole 4. The device-side noise suppressor 7 is configured as described above.

The base material on the diaphragm side has the same material and shape as the base material on the device side (square shape with one side D) and has a height (length) L ₂ (= 12 mm). The noise suppressor 7 of FIG.

As described above, the device-side noise suppressor 7 and the diaphragm-side noise suppressor 8 are respectively configured (FIG. 2).
(A) (b)). In addition, in order to explain the notch 5 in each drawing, it is described that a gap is formed with a predetermined width, but in reality, it is closed due to the flexibility of the base 1.

The noise suppressors 7 and 8 formed as described above were measured with a negative ion measuring instrument (EB-12A, manufactured by Eco-Hollistec Co., Ltd.), and per 1 cm ³ of air around the noise suppressor, It was confirmed that about 1200 negative ions were emitted. Since the above-mentioned measuring tool measures the ion density collected in a predetermined volume in the measuring device sensitive portion, the noise suppressing tools 7 and 8 made of the same material give substantially the same measurement results. However, the total amount of negative ions emitted is naturally L ₁ > L ₂ , and therefore the noise suppressor 7 is larger than the noise suppressor 8.

[2] Embodiment of earphone 16

At the end of the main cord 11 on the device side, the plug 1
4 branch cords 1 from the forked part 12 to the other end
Divided into 3 and 13, the voice generators (vibration plates) 15 for the left and right ears are attached to the tips of the respective branch cords 13 to form the earphone body 10. At the position near the plug (reproduction device side) of the earphone body 10, the noise suppressor 7 of the above embodiment is provided.
The notch 5 is opened, the main cord 11 is passed through the notch 5, and the noise suppressor 7 is fitted to the main cord 11. Similarly, on the diaphragm side of the main cord 11, the noise suppressor 8 is similarly fitted in the vicinity of the forked portion 12 which is divided into the left and right.

In the noise suppressor 7 of the bifurcated portion 12, it is desirable that the branch cord 13 be mounted as close to the diaphragm as possible, but on the branch cords 13 and 13 side,
Since two noise suppressors are required, it is efficient to attach them to the bifurcated portion 12 in front of the branch cords 13, 13 so that only one is required.

In this way, the earphone 16 of the present invention
(FIG. 1A).

[3] Test example

The plug 14 of the earphone 16 of the present invention is inserted and attached to the jack of the reproducing apparatus, and about 30 people (including sound engineer, music critic, and musician) try the monitor, and the noise suppressor 7 When asked about their impressions of changes in sound before and after wearing Nos. 8 and 9, the effects of noise suppression 7 and 8 were confirmed by all.

[0039] In particular, the three people gave the following specific impressions.

(1) Male 38-year-old office worker When I commute to work, I always bring a portable CD to listen to classical music.
I was very surprised that the sound space as if playing in the concert hall was expanded and the sound for each part of the instrument became clear by adding (). I found that I was tired even after listening for a long time and I felt more relaxed than when I was listening normally.

(2) Male 53-year-old company executive I always listen to music in my own room, equipped with audio equipment. This is because if you get accustomed to the sound quality that your ears are good for, you will not be able to listen to it on a portable playback device, that is, the sound quality will be poor and you will not be able to listen to it. However, when I listened to the music I usually listen to with this Iomic installed in a portable player, I was surprised to find that it was reproduced with faithful sound quality! Unintentionally, I asked, "Why?"
I was so surprised that I took earphones on the way. We admire those who have developed this material and product.

(3) Female 28-year-old office worker I do chorus as a hobby. Therefore, it is essential to have a portable cassette player for playing your favorite music. When I listened to the pops I usually listen to by attaching this Iomic to the headphone cord, "What this!
The sound is completely different! Why is it so beautiful! Was my first voice. I remember the song while Iomic was added and I was immersed in a sense of superiority. The pleasure of commuting has increased.

[4] Other Embodiments

In the above embodiment, a protrusion 18 may be formed on the inner wall of the through hole 4 so that the noise suppressors 7 and 8 fitted to the cord do not move (FIG. 3). in this case,
For example, the projections 18 and 18 may be alternately formed so as to face each other vertically (FIG. 3A), or the projections 18 and 18 may be continuous or intermittent projections in the length direction (FIG. 3A). 3 (b)).

Further, in the above embodiment, the shape of the bottom surface 2 of the base 1 of the noise suppressors 7 and 8 is a square shape.
The shape is arbitrary as long as there is a thickness that can secure the amount of ceramics that can be irradiated with negative ions. For example, a circular shape (FIG. 4A), an elliptical shape (not shown), a triangular prism shape (the same (b)), a hexagonal prism shape (the same (c)), and the like are conceivable.
Further, the shape of the substrate 1 may be spherical (the same as (d)), egg-shaped, bale-shaped, donut-shaped, oval-shaped or the like instead of the columnar shape.

Further, in the above embodiment, the through hole 4 through which the cord is inserted has a circular cross section, but any square or hexagonal shape can be used as long as the cord can be inserted (not shown).

In the above embodiment, the material of the base 1 is synthetic rubber, but any material may be used as long as it is flexible enough to be fitted into the cord by making a cut.

Further, in the above-mentioned embodiment, since the ceramic powder capable of irradiating the negative ions is kneaded and mixed into the substrate, uniform irradiation of the negative ions is possible, which is preferable, but the ceramic has other shapes such as granular, It may be in the form of a line, a small piece, or the like (not shown). Alternatively, a foil-shaped ceramic body may be attached to the inner wall of the through hole, or the ceramic body may be coated (not shown).

Further, in the above-mentioned embodiment, the notch 5 is formed to facilitate the attachment / detachment to / from the cord, but the notch 5 may be omitted. In this case, the base body 1 is divided into two in the axial direction to form a base body piece 1a and a base body piece 1a, and the recessed strip 1 is formed at the joint portion.
It is also possible to form the substrate 1 by forming 9 protrusions and stripes 20 and fitting the divided substrate pieces 1a and 1a into the substrate 1 (FIG. 5 (a)). In this embodiment, the base 1 need not be flexible and can be rigid. Similarly, in the example in which the notch 5 is omitted, the two divided base material pieces 1a and 1a are
It is also possible to cover the base 21 with the cover 21 having the axial flanges 22 and 22 and rotatably connect one edge 23 of the flange 22 to configure the base body 1 (FIG. 5B).

[0050]

Second Embodiment Another embodiment of the present invention will be described with reference to FIGS. In the first embodiment, an example in which a noise suppressor that can be attached to the earphones in the related art is used has been described. However, the present embodiment is an example integrated with the earphone.

[1] Embodiment of earphone 30

A powdery ceramic body is kneaded into and mixed with the main body portion (noise suppressing body) 27 of the plug 14 on the reproducing apparatus side. That is, the plug 14 has a main body portion 27 in which an electric conductor portion is connected to the core material (conductor wire) of the main cord 10 and is formed of an electrically insulating synthetic resin material that wraps the outside of the conductor portion. Body part 27
Is formed in a shape and size substantially equal to that of the noise suppression device 7 of Example 1, the code direction length L ₁ of the body portion 27 includes a L ₁ of the noise suppression device 7 of Example 1 They are formed to the same degree (FIG. 8A).

Also, as in the first embodiment, the main cord 1
Reference numeral 0 is a forked portion 12, which is divided into branch cords 13 and 13. A noise suppressing body 28 formed by kneading and mixing a powdery ceramic body is fixed around the forked portion 12. That is, the noise suppressor 28 is the cord 1 through which the conductor passes.
The main cord 11, the branch cords 13 and 1 are integrally formed with the insulating coatings 0 and 13 and are made of a synthetic resin made of an electrical insulator.
It is formed integrally with 3. The noise suppressor 28 is formed in the same shape and size as the noise suppressor 8 of the first embodiment,
The length L ₂ of the cord in the length direction is also formed to be approximately the same (FIG. 8B).

Further, voice generators (vibration plates) 15, 15 for the left and right ears are attached to the tips of the respective branch cords 13, 13. Branch code 13 adjacent to voice generator 15
In this portion, the noise suppressor 29 is formed integrally with the insulating coating of the branch cord 13. The noise suppressor 29 is formed by kneading and mixing a powdery ceramic body. That is, the noise suppressor is integrally formed with the insulating coating of the branch cord 13 through which the conducting wire is made of synthetic resin made of an electrical insulator, and is molded or fixed integrally with the branch cord 13 (FIG. 7B). ). Although the noise suppressor 29 is formed or fixed integrally with the insulating coating of the branch cord 13 through which the conducting wire passes, it may be formed or fixed integrally with the outer frame of the sound generator 15.

Further, here, the shape of the noise suppressor 29,
Since the size is distributed by the branch cords 13 and 13, it is desirable to adjust the necessary amount of negative ions in consideration of locking to the ear and form the size as small as possible.

As described above, the earphone 3 of the present invention
0 (FIG. 7A). The ceramic body in the above is the same as that in the first embodiment. Also, the main body part 2
7. The noise suppressors 28 and 29 are made of synthetic resin,
In order to enhance the integrity with the cords 10 and 13, it is desirable that the cords be made of a flexible or elastic material.

[2] Other Embodiments

The shapes of the main body portion 27 and the noise suppressors 28 and 29 in the above embodiment are not limited to the shapes shown in the figures, but can be freely formed (not shown).

Also, in the above embodiment, the sound generator 1
The earphone 30 may be configured by omitting the noise suppressors 29, 29 adjacent to 5 (FIG. 9). Further, the noise suppressor 28 of the bifurcated portion 12 may be omitted to configure the earphone 30 (FIG. 10).

In the above embodiment, the main code 1
It is also possible to construct a noise suppressor by kneading ceramic powder capable of irradiating negative ions into the insulation coating of 0 and the branch cords 13 and 13 (not shown).

Further, in the above-mentioned embodiment, if the required amount of negative ions can be secured, at least one of the main body portion 27, the noise suppressors 28 and 29, the main cord 10 and the branch cord 13 is used as a noise suppressor, and the negative ion is used. The earphone can also be configured by mixing ceramic powder capable of irradiating (not shown). In this case, it is desirable to form the main body portion 27 which can work most effectively.

[0062]

According to the noise suppressing method of the present invention, since the cords of the earphones are irradiated with negative ions, the static electricity generated in the conducting wire can be removed, the noise can be reduced, and the sound close to the original sound source can be reproduced. effective.

Further, in the earphones of the present invention, the negative ion generating means is provided at the plug-side end portion and / or the sound generating portion-side end portion of the cord, so that the amount of the negative ion generating means is small and the efficiency of the negative ion generating means is small. There is an effect that ion irradiation is possible.

Further, in the noise suppressor of the present invention, since the ceramic body for generating negative ions is embedded in the base material having the through hole through which the cord can be inserted, it can be attached to the cord of a normal earphone, There is an effect that the negative ions can be easily irradiated. Further, if the base is made of a flexible resin material and the notch is formed, it can be easily attached to the cord, and if the protrusion is formed on the hole wall of the through hole, the noise suppressor can be started from a predetermined position of the cord. There is an effect that does not shift.

[Brief description of drawings]

1A is a diagram showing an outline of an embodiment of an earphone according to the present invention, and FIG. 1B is an enlarged sectional view taken along line AA in FIG. 1A.

2A and 2B are perspective views of the noise suppressor of the present invention.

FIG. 3A is a cross-sectional view of another embodiment of the noise suppressor of the present invention in a direction parallel to the axis, and FIG. 3B is a vertical cross-sectional view of the other embodiment.

FIG. 4 is an example of another noise suppressor, in which (a) to
(C) is a bottom view and (d) is a perspective view.

FIG. 5 is another noise suppressing means used for the earphones of the present invention, (a) is a bottom view and (b) is a sectional view in a direction perpendicular to the axis.

FIG. 6 is a perspective view of another negative ion generating means of the present invention.

FIG. 7 is an earphone according to a second embodiment of the present invention, in which (a) is a diagram showing an outline and (b) is an enlarged part of a voice generation unit.

8A and 8B are perspective views of the noise suppressor.

FIG. 9 is a diagram showing an outline of another earphone according to the second embodiment.

FIG. 10 is a diagram showing an outline of another earphone according to the second embodiment.

[Explanation of symbols]

1 base 1a Base piece 2 Bottom of base 4 through holes 5 notches 7 Noise suppressor 8 noise suppressors 10 Earphone body 11 Main code (code) 12 Bifurcation (branch point) 13 Branch code (code) 14 plugs 15 Sound generator (diaphragm) 16 earphones 18 protrusions 25 Negative ion generation means (Fig. 6) 27 Main body (noise suppressor, noise suppressor) 28 Noise suppression body (noise suppression means) 29 Noise suppression body (noise suppression means) 30 earphones

Claims (7)

[Claims] 1. A noise from an earphone, comprising: an earphone in which a voice generating unit and a plug are connected by a cord, wherein at least one of the voice generating unit, the plug and the cord is irradiated with negative ions. Suppression method. 2. Negative ions per cubic cm,
The method for suppressing noise from earphones according to claim 1, wherein 500 to 2000 pieces are emitted. 3. A cord having a sound generating portion at one end and a plug connecting the other end to a reproducing device, and at least at a plug side end portion and / or a sound generating portion side end portion of the cord,
Earphones characterized by being provided with negative ion generating means for generating negative ions toward the cord. 4. A cord has a voice generating portion at one end and a plug for connecting the other end to a reproducing device, and the cord, the voice generating portion and at least one non-conductor portion of the plug are charged with negative ions. Earphones characterized in that powdery negative ion generating means for generating are embedded. 5. A noise suppressor characterized in that a ceramic body for generating negative ions is embedded in a base material, and a through hole is formed in the base material so that a cord of earphones can be inserted therethrough. 6. A base is made of a flexible resin material, a notch communicating with the through hole is formed in the base, and a projection for holding cords is formed on a hole wall of the through hole. The noise suppressor according to claim 5. 7. The noise suppressor according to claim 5, wherein a ceramic powder that generates negative ions is kneaded into a resin material and solidified to form a substrate.