JPS6338626Y2 - - Google Patents

Description

[Detailed description of the invention] The purpose of this invention is to provide a windshield for a microphone that can minimize noise caused by wind to the microphone when collecting sound using a microphone indoors or outdoors. do.

As shown in Fig. 1, this type of conventional microphone windshield is of the type in which the outer wall of the microphone a is directly covered with a foamed windshield b. It passes through the air bubbles of the (breathable foamed member) to reach the outer wall of microphone a, and although it is somewhat effective in reducing wind noise, it is not satisfactory.

Therefore, one possible solution to this problem is to create a gap between the inner wall of the windshield and the outer wall of the microphone to soften the wind that passes through the air bubbles of the windshield made of breathable foam material. .

However, the porous members used for these purposes are mainly elastic materials and are weak, so if they are structured to create the above-mentioned void chambers,
There is a drawback that it lacks stability when attached to a microphone, and there is also the problem that the windshield itself tends to vibrate due to wind pressure, causing noise generation.

This invention solves the above-mentioned conventional drawbacks and problems, and will be explained below with reference to FIGS. 2 and 3.

FIG. 2 shows an embodiment of the microphone windshield of this invention, which is attached to a microphone.

This windshield is formed of a foamed member having air permeability, for example, an elastic porous urethane material, and has a shape consisting of a substantially cylindrical body 2 closed at one end, for example, an outer diameter of the substantially cylindrical body 2. is approximately 60 mm, and its inner diameter is 30 mm.Meanwhile, a mesh-like cylinder 3 with a thickness of approximately 2 mm, many holes shaped approximately 3 mm square, and an outer diameter of approximately 30 mm is inserted into the inner wall of the approximately cylindrical body 2 of the windshield. It is inserted so that they touch each other.

This mesh cylinder 3 may be made of metal as long as it has a porous or mesh shape with open holes to form an air layer, but it may be made of metal, for example, by integral molding of polyethylene resin. It also has the advantage of being flexible, not causing abnormal deformation due to external forces, and being able to reduce weight.

Furthermore, in this invention, one part of the inner wall of the mesh cylinder 3 is formed in order to form a gap 4 between the inner wall of the mesh cylinder 3 and the outer wall of the microphone 1 together with the air layer formed by the mesh cylinder 3. Cushioning materials 5, 5', such as elastic members, are provided so as to be closely fixed to the parts.

By arranging the cushioning materials 5, 5', it is possible to easily insert the microphone 1 into the mesh cylindrical body 3 and to fit the microphone 1 tightly.

Due to these mesh-shaped cylindrical body 3 and the cushioning materials 5, 5', there is a gap 4, that is, about 3.5 mm, between the inner wall of the substantially cylindrical body 2 and the outer wall of the microphone 1.
A certain amount of voids (layers of air) are formed.

Furthermore, the mesh-shaped cylindrical body 3 has the functions of securing the above-mentioned void 4 and at the same time, allowing the substantially cylindrical body 2 to vibrate due to wind pressure or the like, so that its inner wall does not come into direct contact with the outer wall of the microphone 1.

With the configuration described above, wind from the outside enters inside the inner wall by passing between the bubbles of the substantially cylindrical body 2 having foam-like air permeability, and further passes through the mesh-like cylindrical body 3 and the buffer. The gap 4 formed by the materials 5 and 5' creates a gentle airflow that enters the microphone 1, thereby eliminating wind noise that would adversely affect the microphone 1.

What is shown in Fig. 3 is a curve diagram showing a comparison of the wind noise level between the conventional windshield A which does not have a void and the windshield B which has a void according to this invention. According to this, the wind noise is It appears in the low frequency band, and there is a difference between the conventional one and this invented one.
It can be seen that there is a 10dB improvement.

It goes without saying that the materials and arrangement of parts in this invention can be changed as appropriate depending on the type, size, shape, etc. of the microphone.

This invention provides a windshield for a microphone configured as described above, and due to the existence of a gap between the cylindrical body formed of a foamed breathable member and the outer diameter of the microphone, Wind from the outside passes through the foam-like, almost cylindrical body with air permeability, and then enters the microphone as a gentle air current through the air gap, so it is possible to prevent wind noise from adversely affecting the microphone. It has features such as being able to

[Brief explanation of drawings]

Fig. 1 is a side sectional view of a conventional microphone windshield, Fig. 2 is a side sectional view showing an embodiment of the microphone windshield of this invention, and Fig. 3 is a comparison of wind noise between the conventional windshield and this invention. It is a level curve diagram. 1...Microphone, 2...Substantially cylindrical body of windshield, 3...Mesh cylindrical body, 4...Gap, 5, 5'
...Buffer material.

Claims (1)

[Scope of utility model registration request] Molded from a foam-like breathable material,
A microphone characterized in that a mesh cylinder is inscribed in the inner wall of a substantially cylindrical body with one end closed, and a cushioning material is further provided at a suitable position inside the mesh cylinder to be interposed between the mesh cylinder and the microphone. Windshield for use.