KR100306759B1 - Microphone Orientation Test Device for Multimedia Monitor - Google Patents

Abstract

At least one speaker, which is arranged at a predetermined distance from the monitor and directed to the reference point where the microphone is installed on the monitor, outputs a predetermined reference sound through the speaker and visually displays the level of the signal output from the microphone by touching the reference sound. Disclosed is a microphone directivity test apparatus for a multimedia monitor having a fixing means for maintaining a constant distance between a measurement main body and a speaker's directivity state and a reference point.

Therefore, it is possible to easily and accurately visually evaluate the operating characteristics such as the directivity of the microphone employed in the monitor to perform the multimedia function, thereby maximizing the reliability of the product for the monitor.

Description

Microphone Directivity Test Device for Multimedia Monitor

The present invention relates to a microphone directivity test apparatus for a multimedia monitor. More particularly, in order to reliably test the directivity of a microphone installed in a monitor, a plurality of speakers are arranged at a predetermined distance from a reference position to generate a predetermined sound. In one aspect, the present invention relates to a microphone directivity test apparatus of a multimedia monitor that visually determines directivity.

Recently, due to the development of electronic technology, computers and peripheral technologies are rapidly changing, and among them, various connections to video and audio media such as audio devices, audio devices, and communication devices for performing multimedia functions are connected to the computer. It is being tried.

In order to perform a multimedia function through connection with the above-mentioned media, various devices in which an interface protocol with an audio device, an audio device, and a communication device are embedded in a computer main body are externally or embedded. Accordingly, the use of the monitor is also beyond the limited use having only a simple display function, and as a representative example, devices such as a speaker or a microphone are installed in the monitor. Condenser microphones are widely used as microphones.

For the multimedia functions described above, the characteristics of equipment such as a microphone or a speaker additionally installed in the monitor act as a factor determining the reliability of the entire monitor, and thus, performance tests must be performed in the manufacturing process.

However, in the related art, since the characteristic test on the microphone was performed manually, there was a problem in that the reliability of the test result was lacked, which in turn acted as a factor that lowered the product reliability of the monitor.

In detail, the operation state of the microphone employed in the monitor has been conventionally determined by a method of determining whether the microphone is in a normal operation state by checking the sound output by directly hitting the microphone by hand or by blowing in the manufacturing process.

However, in the above-described process, it is difficult to accurately evaluate the directivity of the microphone, that is, the state of being intercepted for each position, and it is difficult to determine the exact output characteristics.

Therefore, there is a problem in that the overall reliability of the monitor employing the microphone as well as the microphone is deteriorated for the reasons described above.

Accordingly, an object of the present invention is to solve the above problems, the microphone directivity of the multimedia monitor that can accurately and visually check the operating characteristics of the microphone in the process of assembling the monitor, and can give reliability to the inspection result In providing a test apparatus.

1 is a view showing a preferred embodiment of a microphone directivity test apparatus of a multimedia monitor according to the present invention.

FIG. 2 is a block diagram showing an internal configuration of the measurement main body of the embodiment of FIG.

<Explanation of symbols for main parts of the drawings>

10: reference points 12, 14, 32, 34: speaker

15: fixed part 16: measuring body

20, 28: amplifier 22: indicator

24 stabilization circuit 26 oscillator

30: switch 36: control panel

38: amplifier

In order to achieve the above object, the microphone directivity test apparatus of the present invention monitors a reference point at which a microphone installed in a monitor is located, and at least one speaker spaced a predetermined distance therefrom and outputs a predetermined reference sound through the speaker. And a measuring body for visually displaying the level of the signal output from the microphone by tapping the reference sound, and fixing means for keeping the distance between the directing state of the speaker and the reference point constant.

In addition, at least two microphones may be installed at different positions, and each microphone may be installed at a predetermined rotated position on the same distance with respect to the reference point. Preferably, different speakers may be installed in a first position and a second position. Respectively installed in the second position, and the second position may be installed at a position rotated in an angle range of 90 ° to 150 °.

The fixing means may be configured to couple the speaker to the measurement main body, and the measurement main body amplifies the output of the microphone and the reference sound generating means for generating the predetermined reference sound and outputting it to the speaker. And display means for displaying.

The reference sound generating means includes: a stabilization circuit for stabilizing a supply voltage to a predetermined level and outputting the same; an oscillating means for oscillating a predetermined frequency signal according to the voltage output from the stabilizing circuit; and amplifying a predetermined frequency signal output from the oscillating means. It may be provided with a first amplifying means for outputting, and the switching means is further connected to the output side of the amplifying means may be configured to output a signal to any one of a plurality of speakers.

The display means may include a second amplifying means for amplifying the signal output from the microphone to a predetermined level and an indicator for visually displaying the output level of the second amplifying means, wherein the indicator is provided with a 7-segment. It may be provided with a plurality of input signals to convert the input signal into a character representing a predetermined noise level to be displayed.

Hereinafter, the features and advantages of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, an embodiment according to the present invention is a speaker 12 and a speaker 14 spaced apart from a reference point 10 where a microphone (not shown) installed in a multimedia monitor (not shown) is located. ) And the speaker 12 and the speaker 14 are fixed to each end of the fixing portion 15 extending in two directions in a right angle shape, the fixing portion 15 is placed on the upper portion of the measurement body 16 It is fixed.

As an example, as shown in FIG. 1, the fixing unit 15 fixes the speaker 12 and the speaker 14 to the upper portion of the measurement main body 16. Alternatively, the speaker 12 and the speaker 14 are movable fixing units. It can be installed by (15), it is also possible to apply differently to the arrangement position with respect to the reference point (10).

The speaker 12 and the speaker 14 are fixed to the reference point 10 at the end of the fixing part 15, respectively, in the embodiment of FIG. 1, the two speakers 12 and the speaker 14 are referred to as reference points ( The speaker 12 is positioned at the same distance from 10) and rotated by a predetermined angle (for example, 120 °) with respect to the speaker 14.

However, this is limited to the embodiment and illustrated, and may increase the number of speakers, it may be repeatedly configured in a predetermined angular rotated position while maintaining the same distance to the reference point 10 per speaker increases.

On the other hand, the measurement main body 16 is a sound generating portion for outputting a predetermined reference sound through the speaker 12 and the speaker 14 and a microphone (not shown) amplifies the output signal by amplifying the output signal to the visual It may be provided with a display portion for displaying as shown in FIG.

Referring to FIG. 2, the embodiment is a component for generating and outputting a predetermined reference sound in the measurement main body 16. The stabilization circuit 24 to which the constant voltage Vcc is applied outputs a voltage having a constant level of potential. The oscillator 26 is configured to oscillate a signal having a predetermined frequency according to the voltage supply of the stabilization circuit 24 and output the signal to the amplifier 28, and the amplifier 28 outputs the input signal with a predetermined amplification degree. It is configured to amplify and apply to the switch 30, the switch 30 is configured to selectively output a signal having a predetermined frequency to any one of the speaker 32 and the speaker 34.

At this time, the oscillator 26 is configured to be applied to the amplifier 38 after the output of the stabilization circuit 24 is smoothed through the condenser 24 and parallel to determine the time constant for determining the oscillation frequency on the other input side of the amplifier 38. The connected resistor R1 and capacitor C2 are connected. In addition, the switch 30 is configured to apply a selection signal applied from the operation unit 36, which may be a button or a lever, for selective determination of the output direction. In addition, the speaker 32 and the speaker 34 may be understood as the same elements by the reference numerals different from the speaker 12 and the speaker 14 in FIG. 1 but one-to-one correspondence, to explain the operation of the embodiment In the part described later, the speaker 12 matches the representation of the sign with the speaker 32, and the speaker 14 matches the representation of the sign with the speaker 34.

Meanwhile, as an example, the measurement main body 16 has a configuration for initially displaying a predetermined sound as shown in FIG. 2, and specifically, a reference point for a predetermined reference sound generated by the speaker 12 or the speaker 14. A predetermined signal Sm, which the microphone of 10 is intercepted and output, is applied to the amplifying unit 20, and the amplifying unit 20 amplifies the input signal with a predetermined amplification degree and then applies it to the display 22. It is composed.

The indicator 22 is configured to display the Arabic number in a plurality of 7-segments, and the indicator 22 is configured to display the applied signal in terms of decibels (dB) used as a normal sound measurement unit.

The operation of an embodiment according to the present invention configured as described above will be described.

When the constant voltage Vcc is applied to the stabilization circuit 24, a voltage of a predetermined level is output, and the stabilization circuit 24 is at a level which does not deviate from the preset range so that the frequency of the reference sound output from the generator 26 is constant. The potential is set to output a voltage.

When a voltage having a stable level is applied in the stabilization circuit 24, the oscillator 26 performs an oscillation operation at a frequency corresponding to a time constant determined by the capacitor C2 and the resistor R1, and the oscillator 26 performs predetermined oscillation through the amplifier 38. A signal having a frequency is output, and the signal having the frequency is input to the amplifier 28, amplified to a predetermined level, and then applied to the switch 30. The amplifier 28 compensates the output to a level suitable for applying the output of the oscillator 28 to the speaker 32, and the output direction of the switch 30 in accordance with the selection signal applied from the operation unit 36. This is determined, and the output signal of the amplifier 28 is applied to the speaker 32 or the speaker 34 through the switch 30. As described above, when a signal having a predetermined frequency is applied, either the speaker 32 or the speaker 34 performs a pronunciation operation. First, when the speaker 32 performs the pronunciation operation, later switching of the switch 30 is performed. As the state is switched, the output of the amplifier 28 is applied to the speaker 34 through the switch 30 so that the speaker 34 performs the pronunciation operation.

As described above, when the pronunciation operation is first performed on the speaker 32, interception is performed at the microphone located at the reference point 10 as a predetermined reference tone, and the resultant microphone transmits the signal Sm to the amplification unit 20. Is authorized. At this time, the signal applied to the amplifying unit 20 is amplified to a predetermined amplification degree is applied to the display 22, the noise level according to the level of the applied signal is converted into decibels in the display 22 is displayed.

Although it may have various specifications according to the type of the microphone employed in the monitor, for example, when the result of hearing from the microphone at a certain distance from the speaker, that is, the allowable limit displayed on the indicator 22 requires a noise level of 7 dB or more. While checking the numerical value displayed on the indicator 22, if it is less than the standard can check the failure of the microphone to proceed with the subsequent manufacturing process for parts replacement.

Then, when the confirmation of the listening result according to the pronunciation of the speaker 32 is finished, the result of listening to the sound generated from the speaker 34 disposed at a position rotated 120 ° with respect to the speaker 32 to confirm the directivity is obtained. The process of checking is performed, and the process of generating sound and processing of the audible signal Sm therefor are the same as those of the speaker 32 described above, and the result is displayed on the display 22.

Even when the sound of the speaker 32 is sounded, even when the listening state is good, when the directivity to the direction of the speaker 34 is inferior, a value displayed on the indicator 22 may not reach the preset allowable limit. In this case, since the microphone has poor directivity, the subsequent procedure for exchanging the above-described parts is performed.

By sequentially performing the above-described process, the operation characteristic of the microphone installed in the monitor is inspected. Therefore, the directivity can be inspected and the operating characteristic, that is, the noise level can be numerically displayed and visually recognized.

As described in detail above, the present invention has been described in detail with respect to preferred embodiments, but those skilled in the art to which the present invention pertains, various embodiments of the present invention without departing from the spirit and scope of the present invention It will be appreciated that the present invention may be modified or modified as described above.

Therefore, according to the present invention, it is possible to easily and accurately evaluate the operation characteristics such as the directivity of the microphone employed in the monitor to perform the multimedia function, thereby maximizing the reliability of the product for the monitor.

Claims (8)

A first speaker installed to direct the microphone at a first position spaced a predetermined distance from the front of the microphone with respect to a reference position at which the microphone installed on the monitor is located; A second speaker that is rotated at an angle from the first speaker and directed to the microphone at a second position; A measurement main body for outputting a predetermined reference sound through the first and second speakers and visually displaying a level of a signal output from the microphone by intercepting the reference sound; And And a fixing means for maintaining a constant distance between the directing states of the first and second speakers and the reference position. The method of claim 1, The second position is a microphone directivity test collection of the multimedia monitor, characterized in that included in the angular range of 90 degrees to 150 degrees with respect to the first position, different speakers are installed in the first position and the second position, respectively, And the second position is a position rotated in a range of 90 degrees to 150 degrees relative to the first position. The method of claim 1, And said fixing means couples said first and second speakers to said metrology body. The method of claim 1, The measurement body Reference sound generating means for generating the reference sound and outputting the first and second speakers; And a display means for amplifying and visually displaying the output of the microphone. The method of claim 4, wherein The reference sound generating means is: A stabilization circuit for stabilizing and supplying a supply voltage to a predetermined level; Oscillation means for oscillating a predetermined frequency signal in accordance with the voltage output from the stabilization circuit; And And a first amplifying means for amplifying and outputting a predetermined frequency signal outputted from the oscillating means. The method of claim 5, And a switching means is further connected to an output side of the first amplifying means to output a signal to any one of the first and second speakers. The method of claim 4, wherein The display means is: Second amplifying means for amplifying the signal output from the microphone to a predetermined level; And an indicator for visually displaying the output level of the second amplifying means. The method of claim 7, wherein Wherein the indicator is provided with a plurality of 7-segment microphone directivity test apparatus of the multimedia monitor, characterized in that configured to convert the input signal into a character indicating a predetermined noise level.