KR101463127B1 - Speaker test box with hood - Google Patents

Abstract

The present invention relates to a loudspeaker test box having a lid and an input signal generated from the loudspeaker is supplied from a microphone and is used to measure a sound quality of a loudspeaker using a sound quality testing apparatus. The loudspeaker test box includes a top plate, a bottom plate, And a loudspeaker provided with a vibration attenuating member to which the microphone is attached and is coupled to an inner surface of the side wall and capable of absorbing vibrations, the loudspeaker test box comprising: And a cover box connected to the rotating means is provided to be openable and closable.

Description

Speaker test box with hood < RTI ID = 0.0 >

The present invention relates to a loudspeaker test box with a lid, and a loudspeaker test box with a lid that enables easy testing of abnormal sounds of a large-output loudspeaker.

The speaker test box is a device that tests the sound quality of the speaker.

A related art related to this is disclosed in a speaker test box having a vibration damping member disclosed in Japanese Patent Application No. 10-1222305 filed by the present applicant.

Referring to FIG. 1, an input signal generated by a speaker 10 is supplied from a microphone 20, and a sound quality inspection device is used to measure the sound quality of a speaker And a side wall 50. The microphone is mounted on the inner surface of the sidewall of the test box and has a vibration absorbing vibration The vibration damping member 100 is further provided with a buffering means 110. When a microphone is installed in a closed box and a speaker is mounted on the upper portion of the box, sound (sound pressure) Sounding the space and measuring the sound pressure at this time.

However, since the speaker is exposed to the outside in the past, external noise generated during the measurement passes through the vibration of the speaker and is transmitted to the microphone in the speaker test box with the cover, which causes a measurement error due to environmental noise .

Also, when the volume of the test box is small, the sound pressure of the low-tension band (20 to 100 Hz) is raised due to the pressure generated by the speaker, and the driving range of the loudspeaker diaphragm is also reduced. There has been a problem that the measurement becomes impossible because the occurrence is reduced.

At this time, the problem can be solved by increasing the volume of the test box, but there is a problem that it can not be increased indefinitely in order to realize production automation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a loudspeaker test box having a lid which is sealed when the loudspeaker sound quality test is performed to reduce external noise, There is a purpose.

It is also desirable to provide a speaker test box with a lid that can increase the accuracy of the test by preventing the sound pressure from being excessively high in a space for testing the loudspeaker's sound pressure even within the limited test box size, It has its purpose.

According to another aspect of the present invention, there is provided an apparatus for measuring sound quality of a loudspeaker using a sound quality analyzer, the apparatus being provided with an input signal generated by a speaker, And a lid coupled to an inner surface of the sidewall. The loudspeaker test box is provided with a rotating means on one side of the upper plate, And a cover box connected to the rotating means is provided to be openable and closable.

The rotating means is a hinge.

The upper plate is composed of an outer frame, a support plate having a hole in which the speaker is seated, and an air circulation path through which air can flow between the frame and the support plate.

According to the present invention having the above-described configuration, the following effects can be expected.

First, since the speaker is made in the test box when the speaker is tested, the noise is prevented from being transmitted to the outside and the external noise is prevented from being transmitted to the inside.

In addition, since the space (lower space portion) where sound pressure is generated in the limited space of the test box is communicated with the upper space portion, vibration reduction phenomenon of the diaphragm in the lower space portion during the large output speaker test is reduced, So that it is possible to improve the quality management performance of the speaker.

1 is a perspective view of a speaker test box with a conventional vibration attenuating member;
2 is a perspective view of a speaker test box with a lid according to an embodiment of the present invention;
3 is another perspective view of a speaker test box with a lid according to an embodiment of the present invention;
4 is another perspective view of a speaker test box with a lid according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a perspective view of a speaker test box with a lid according to a preferred embodiment of the present invention, FIG. 3 is another perspective view of a loudspeaker test box with a lid according to an embodiment of the present invention, Figure 3 is another perspective view of a speaker test box with a cover according to an embodiment.

Referring to FIGS. 2 to 4, a speaker test box having a cover according to the present invention is provided with a microphone 20 for receiving an input signal generated by a speaker 10, and measuring the sound quality of the speaker using a sound quality testing device The microphone 20 is mounted on the inner side of the upper plate 30, the lower plate 40 and the side wall 50. The microphone 20 is coupled to the inner surface of the side wall 50, The cover box 70 is further provided in the speaker test box provided with the vibration damping member 100 in which the vibration damping means 110 is formed.

The cover box 70 is provided at an upper portion of the upper plate 30 and can be opened and closed.

At this time, the cover box 70 is formed to have a lower open shape.

The cover box 70 is provided with a rotating means 60 on one side of the upper plate 30 so as to be opened and closed by the upper plate 30 and the cover box 70 is connected to the rotating means 60 And can be opened and closed.

Here, the rotating means 60 is a hinge and can be easily opened and closed.

Since the lid box 70 is provided at a place where the loudspeaker is tested, it is possible to improve the accuracy of the loudspeaker test because external noise is blocked.

The upper plate 30 is composed of a frame 32, a support plate 34, and an air circulation passage 36.

In this case, the frame 32 is provided with a grid-shaped frame 32 along the outer edge of the upper plate 30, and the rotating means 60 connected to the upper plate 30 is connected to the frame 32 ). ≪ / RTI >

The support plate 34 is formed in a plate shape provided on the inner side of the upper plate 30 and has a hole 33 in which a speaker 10 is seated.

An air circulation path 36 through which air can flow is formed between the frame 32 and the support plate 34.

That is, the microphone is installed in the lower part by the upper plate 30 and is divided into a lower space where a test is performed and an upper space located inside the cover box 70. Here, the air circulation path (36) And the upper space to communicate with each other.

This is because when the sound pressure is increased according to the capacity of the speaker 10 as the lower space communicates with the upper space, the driving range of the diaphragm can be prevented from being transmitted to the lower space portion.

Here, the abnormal noise generated at the defective part is detected by the vibration of the diaphragm, and the defective speaker is selected. In the case of the large-output speaker, the vibration of the diaphragm is often reduced by the sound pressure.

That is, the air circulation path 36 connects the high pressure of the lower space portion with the upper space portion to make the pressure uniform.

As a result, the motion of the diaphragm and the voice coil is smoothly performed, and a similar effect of measuring in a wide space such as an anechoic chamber can be obtained.

Therefore, even when the size of the speaker is increased, there is an advantage that it can be tested in a limited box volume.

As described above, it can be seen that the present invention provides a speaker test box with a lid as a basic technical idea, and within the scope of the basic idea of the present invention, Of course, many other variations are possible.

10: Speaker
20: microphone
30: top plate
40: Lower plate
50: side wall
60: rotating means
100: vibration damping member
110: vibration damping means

Claims (3)

An apparatus for measuring the sound quality of a loudspeaker using a sound quality testing equipment by receiving an input signal generated by a speaker 10 from a microphone 20 and measuring a sound quality of the loudspeaker is provided with an upper plate 30, a lower plate 40, in,
A loudspeaker test box having a lid attached with a vibration damping member 100 to which the microphone 20 is attached and a vibration damping means 110 capable of absorbing vibration is further attached to the inner surface of the side wall ,
And a lid box (70) connected to the rotating means is provided at one side of the upper plate and is openable and closable. The method according to claim 1,
Characterized in that the rotating means (60) is a hinge. The method according to claim 1,
The upper plate (30)
A support plate 34 on which an outer frame 32 and a hole 33 on which the speaker is seated are formed and an air circulation passage 36 through which air can flow between the frame and the support plate Speaker test box with cover.

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