KR20190070565A - Wide range of acoustic collection system - Google Patents

Abstract

The present invention comprises: a sound collecting plate formed of a material blocking sound from a speaker, such as plastic, wood, and metal, having a curved surface or a spherical surface, and having the inner surface formed as a reflective surface; a plurality of microphones formed in a specific position, at which the sound is collected, inside the sound collecting plate structure; an acoustic mixer forming the plurality of microphones into one system; and a sound collecting range formed by combining, in the front, rear, left, and right directions, sound collecting ranges formed by combining the plurality of microphones with the sound collecting plate. The sound collecting range and a movement range in which a lecturer moves are formed to be the same. The internal surface reflectance of the sound collecting plate ranges 0.1 to 90%. An acoustic reflector is provided on the front of each of the microphones to be spaced therefrom by a proper use distance of the microphone. According to the structure of the microphone, upper, lower, left, and right rotating frames and a position tracking device are coupled to the sound collecting plate to rotate according to the sound direction in which the lecturer moves, and the structure of the sound collecting plate is formed in both front and rear directions. According to the present invention, a lecturer can move in any direction without a microphone while having the same effect of lecturing with a microphone.

Description

Wide range of acoustic collection system

 The present invention relates to a wide-range sound collector system in which a lecturer in a lecture room or the like freely moves a plurality of listeners without a microphone, but the entire range of movement is collected as one microphone system.

   It is essential to use a microphone when lecturers address lectures to a large number of students. Furthermore, the use of a microphone is essential for voice recording, transmission, and broadcasting.

   Generally, the range of the microphone used in the lecture room, the auditorium, the stage, etc. is within 5-15 cm and the directional angle is also 10-30 °.

   In order to increase the range of the microphone, it is necessary to increase the sound volume of the microphone. In this case, the sound emitted from the speaker corresponding to the speaker enters the microphone, amplified by the amplifier, Howling phenomenon occurs, resulting in restrictions on the usage.

    For this reason, the lecturer should wear a personal microphone or wear it separately.

     Therefore, there is an inconvenience that the lecturer should lecture at a position where the microphone is held or the microphone is held in one hand. The inconveniences caused by the use of microphones became more and more intense in lectures where blackboards, whiteboards, or videos were presented.

    In addition, there is an inconvenience that the contents of the lecture can not be transmitted due to poor contact and maintenance of the microphones such as wired and wireless, and the wireless microphones are required to replace the batteries from time to time.

   When lecturers and lecturers exchanged their opinions, there was a problem that a microphone was delivered to the lecturer.

    In addition, the conventional sound collecting apparatus is a microphone system for selecting only sound at a specific position in a long distance, which can not be used in a lecture room where the lecturer moves widely.

In addition, Korean Patent No. 10-2008-0031919 reverse directional microphone and sound recorder using the same

 Korean Patent No. 10-2012-0028927 A sound pickup having a plurality of microphones is merely a structure to be worn on each ear, and thus it is impossible to collect the entire moving range in which the lecturer moves widely.

Korean Patent No. 10-2008-0031919 Reverse directional microphone and sound pickup using the same Korean Patent No. 10-2012-0028927 A sound recorder having a plurality of microphones

In order to solve the above problem, the present invention was invented in order to allow a lecturer to freely move various lectures while moving his / her hands free, forward, backward, and rightward without carrying a microphone.

 In addition, it collects voice from a long distance and blocks between speaker and microphone to prevent howling, and many microphones arrange each acoustic sound range to form a wide sound collection range. It is composed of one microphone system, So that the voice of the lecturer can be transmitted without a microphone.

In a microphone device

   A sound collecting plate formed of a curved surface or a spherical surface as a material for blocking the sound of a speaker such as plastic, wood, and metal, the inner surface being formed of a reflecting surface,

   A plurality of microphones constituting a specific position at which the sound is collected in the collection panel structure;

   A collecting range in which the collecting ranges formed by combining the plurality of microphones and the sound collecting plate are combined in the forward, backward,

   The collecting range and the moving range in which the steel strip is moved are configured to be the same

   And an acoustic mixer for composing the plurality of microphones as one system.

   Also, the inner surface reflectance of the collection plate is made up of a collection plate having a reflectance of 0.1 to 90%.

   In addition, an acoustic reflector is provided on the front surface of the microphone so as to be spaced apart by a proper use distance of the microphone.

   Further, the upper, lower, left, and right rotating rods and the position tracking device are combined with the microphone structure to rotate according to the sound direction of the steel self-moving.

 The structure of such a sound collecting plate is configured to be both forward and backward.

This invention

Since a plurality of sound collecting plates having a built-in microphone have a plurality of sound collecting ranges to have a wide sound collecting range, a lecturer can freely move to front, rear, left, and right without a microphone, .

   In addition, since a wide range of sound collecting ranges of a plurality of collecting plates and microphones are mixed with a single microphone function to form a single system, uniform sound can be received even if the lecturer moves freely.

     In addition, bidirectional collection is possible by configuring the voice of the lecturer in one direction and the voice of the learner 200 in one direction.

    The system of the present invention tracks movement of the lecturer by the movement sensor, the position tracking sensor, and the like, and rotates the collection plate in the upward, downward, leftward, and rightward directions, thereby forming a wide range of sound collection with a single sound collection microphone system.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
2 is a side view explanatory view
Fig. 3 is an explanatory diagram of the deposition range arrangement
5 (a) is a structural explanatory view of the present invention
5 (b) is an explanatory diagram of the surface of the collector plate structure
6 is a rotational configuration diagram in which the sound collecting plate is rotated up, down, left,
7 is an explanatory diagram of a curved surface collecting plate
8 is an explanatory diagram of a bi-
9 is an explanatory diagram of a dual collector plate structure

 As shown in the drawings,

   A sound collecting plate 2 formed of a curved surface or a spherical surface as a material for blocking the sound of a speaker such as plastic, wood and metal, and having an inner surface formed as a reflective surface;

   A plurality of microphones (1) constituting a specific position at which the sound is collected inside the sound collection board (2); Structure and

    The sound collecting ranges A1 and 2 formed by combining the collecting ranges formed by combining the plurality of microphones 1 and collecting plates 2 and

   The collecting range B and the moving range A in which the lecturer 100 moves are configured identically

   And an acoustic mixer 7 for constituting a plurality of microphones 1 as one system

    The range of movement A of the distant movement of the lecturer 100 is set as a collection range and the prevention of hauling is made so that the lecturer 100 can freely move without lecturing the lecture.

 Also, the reflectance of the surface (s) of the collection plate 2 is made up of the collection plate 1 having a reflectance of 0.5 to 90%

  And the acoustic reflector 2c is provided on the front surface of the microphone 1 by an appropriate distance Y from the microphone

  In addition, it is also possible to combine the upper, lower, left, and right turntable and the position tracking device on the collection plate 2 so as to rotate in accordance with the acoustic direction in which the steel plate is moved and to construct the collecting plates 2, .

    This will be described in detail with reference to the drawings.

   A steel plate 1 having a planar structure such as a whiteboard or a chalkboard and a strong end 5 on which the lecture player 100 moves are constituted as shown in FIGS. 1 and 2, Structure.

  As shown in Figs. 2 and 8, the structure of the collecting plates 2 and 2a is configured both forward and backward.

      8, the voice of the lecturer 100 can be received in one direction and the voice of the lecturer 200 can be received in one direction, so that the lecture attendant 100 and the lecturer 200 can talk And to listen to the opinions of customers of the lectures.

      For example, the structure of the three collection plates (2) is configured in a direction in which the lecturer (100) moves, and the acoustic direction of one collection plate (1) is configured in the direction of the learner (200).

     As shown in FIG. 3, the movement range of the strong tip 5 on which the lecturer 100 moves is A, and the plurality of microphones 1a, 1b, and 1c match the sound reception ranges C1, C2, .

  The collecting range A1 of the first, second and third sound collecting systems 1a, 1b and 1c and the moving range A of the lecturer 200 are the same.

     In the present invention, when the lecture chair 100 moves in the right direction C3 direction, the first microphone C1 is small, but the third microphone C3 is large

    When the lecturer 100 is moved in the direction C1 in the left direction, it is largely received by the third microphone 1C, but is slightly received by the first microphone 1a

    When the lecture chair 100 is located at the center, it is picked up at a central portion that is the second microphone 1b, and is picked up by half at the first and third microphones 1a and 1c.

     However, The second. And the volumes collected by the third microphones 1a, 1b, and 1c are mixed in a single microphone structure.

  As shown in FIG. 4, a plurality of sound collecting plates 2 and 2a and a plurality of first, second, and third microphones 1a, 1b, and 1c provided therein are mixed with a single mixer 7, 6) are connected to the connected amplifier (9). The stopping prevention device 8 is provided at the stop as required.

     Such a system is such that a wide range of sound collecting sounds are collected with a single microphone function in the moving range of the wide range of lecturers 100. In other words, a wide collection range is composed of one system.

The microphone 1 has a plurality of microphones 1 as shown in FIG. 4, and the microphone 1 includes a mixer 7 for integrating the volumes of the microphones 1 collected in a single microphone structure .

   The plurality of microphones 1 configured in this manner are connected to the known amplifier 9 through the mixer 7 and the speaker 6 connected to the amplifier 9.

     The hauling prevention structure is constituted such that the structure of the sound collecting plates 2 and 2a cuts off the connection between the speaker 6 and the microphone 1. The hauling prevention structure is provided between the mixer 7 and the amplifier 9, 8) as an auxiliary device.

   One of the features of the present invention is that a wide collection range is constituted by a plurality of microphones 1 and sound collecting plates 2 and 2a and integrates them into a function of a microphone 1 and at the same time, It is a structure for preventing howling from the speaker 6.

  As shown in FIG. 5 (a), the structure of the collecting plates 2 and 2a is made of one of metals such as plastic, wood, and aluminum, which shields the sound. These materials have the ability to block the sound.

   This is because the microphone 1 is arranged inside the sound collecting plate 1 to disconnect the speaker 6 and the microphone 1 in the sound collection direction to prevent the hauling phenomenon.

   As shown in Fig. 5 (a), the sound picked up from the outside is picked up by the microphone 1 by the curvature of the collection plate 1. Fig.

   This collecting function is proportional to the diameter (c) of the diameters D of the microphone 1 and the diameters of the collecting plates 2 and 2a.

    For example, the voice input range D of a general microphone is 2 cm, and the effective use distance Y of the microphone 1 is 5 to 15 cm. When the diameter of the collection plate (2) is 30 cm, it has a collection ability of about 47 times 30/2 π = 47.10. This is based on a collector plate having a reflectance of 0.1 - 1%.

    Therefore, when the sound collecting board 2 is used, the distant sound collecting ability of the microphone 1 is as follows: the microphone of the lecturer 100 is 5 - It will have the same effect as if it is in 15cm position.

    The minimum diameter of the collection plate 2 should be at least 6 cm, which is at least three times the diameter of the sound absorption range of the microphone (1) phone. This is because 1/2 of the curvature of the collection plate 2 is the focus position so that the microphone 1 is located at the focus F distance of the curvature of the collection plate 2.

    Therefore, the structure of the collecting plates 2 and 2a collects the sound with the caliber of the collecting plate 2 with respect to the D range of the diameter of the microphone 1 as shown in FIG. 4 (b).

However, only the voice in the range of about 10 - 30 ° in the omni direction is input with the appropriate use distance of the microphone Y = 10 - 15cm.

     Such a long-term collection ability is proportional to the reflectance, that is, the gain s, of the surface s of the collecting plates 2 and 2a as shown in Fig. 5B. In other words, reflectance means 1 gain when there is a reflectance of 0.1 - 1% when there is no reflectance, and 2 gain is 2% reflectance. For example, if the reflectance of the surface s of the collecting plates 2 and 2a is two gains, the distant picking distance is 4.6 - 14m, which is twice as large as that of the collecting plate 1 having no reflectance.

   Therefore, the surfaces of the collecting plates 2 and 2a are not limited, but they are limited to 0.5 to 90 gains.

The gain is suitably 20. Therefore, the remote range of the sound collecting board (2) based on the 30 cm can be picked up to a maximum pickup range (C, B) of 15 cm Y 27 times Y 20 gain = 282 m based on the efficient use distance (Y) Do. In other words, it is capable of 940 times the sound collection capability. The larger the diameter of the collection plate 2, the larger the collection function.

   1 and 2, the structure of the present invention constitutes a collection plate 2 at a proper position by using a support 3 in the upper ceiling of a strong end 5.

  The configuration of the collection plate 2 is formed in a curved or spherical shape as shown in Figs. 6 and 7, and has a microphone 1 at a focus F position formed by a curved surface or a spherical surface as shown in Fig.

 As shown in FIG. 9, the sound collection reflection plate 2b is provided at a position spaced apart from the microphone 1 by a suitable distance for use.

  In the structure of the present invention, the volume of the light incident on the collection plate 2 is reflected from the internal reflection plane of the collection plate 2

 The sound pick-up reflection plate 2b is picked up in a state of being picked up at 47 times and picked up by the microphone 1 constituted at the position of Y. [

    This results in the same effect as if the voice of the lecturer (100) at a distance of 47 times is at a distance of 10 to 15 cm.

   That is, when the diameter of the collecting plates 2 and 2a is 30 cm, the sound of the lecturer 100 at 4.7 m - 7 m, which is 47 times 10 - 15 cm, is the same as the sound collecting effect at the position of 10 - 15 cm will be.

   As shown in FIGS. 1, 3 and 8, a plurality of microphones 1 are installed, and the microphones 1 are integrated by mixing them as a single microphone 1 as shown in FIG. 4. Thus, The sound receiving range of each of the plurality of microphones 1 is expanded to the entire range of movement even if the microphone 1 moves freely at a distance of 4 m before and after the left and right 7 m.

   The sound collecting reflector 2b is constructed by a secondary sound collector inside the sound collecting plate 2 and the interval between the sound collecting reflector 2b and the microphone 1 is Y And a distance between the first electrode and the second electrode.

That is, when the sound pick-up angle of the sound collecting reflector 2b and the microphone 1 is set to be within 3 cm, the sound source other than the sound receiving angle of the microphone 1 can not be incident on the microphone 1, The sensitivity of the microphone 1 is lowered and the effect is lost.

Therefore, the present invention can teach a lecturer moving in a wide range without a microphone, and can collect audio of a remote lecturer without using a separate microphone.

  Further, the upper, lower, left, and right turning devices and the tracer tracking device are connected to the sound collector 300 by a single system, and the sound collector is rotated in accordance with the moving direction of the remote lecturer.

 As shown in FIG. 6, the sound collecting apparatuses 2 and 2a are constituted by combining the left and right rotating tables 3b of the upper and lower swing tables 3a and 3b with one sound collector 2 and 2a according to the movement of the lecturer 100, The sound collector 2, 2a is rotated upward, downward, leftward and rightward according to the direction in which the lecture player 100 moves in combination with the lecture 100 tracking sensor device such as a net.

   The present invention diffuses and arranges a plurality of the front collecting plate 2 structures of FIG. 2 one by one for each group of students as shown in FIG. 4, inputs them into a mixer 7, integrates them into one microphone system, 9).

  Accordingly, the present invention can be used in various places such as schools, lecture rooms, discussion classes, auditoriums, churches, and theatrical performances.

1. microphone
1a, 1b, 1c sound collecting system
2. Collection board
3a. Upper and Lower Swivel
3b. Left and right swivel
4. Lecture board
5. The pulpit
6. Speaker
7. Microphone Mixer
8. Howling prevention device
9. Amplifier
A. Left and right picking range
B. Top and bottom collection range
C. Collection Range
D. Mic Collection Range
100. Lecturer
200. Lecturer

Claims (5)

In a microphone device
A collection plate 2 formed of a curved surface or a spherical surface as a material for blocking the sound of a speaker such as plastic, wood or metal, and having an inner surface formed as a reflective surface;
A plurality of microphones (1) constituting a specific position where the sound is collected inside the collection plate (2);
An acoustic mixer 7 for composing the plurality of microphones 1 as one system;
A sound collecting range A1 formed by combining the plurality of microphones 1, the collection plate 2, and the acoustic mixer 7;
By arranging the collecting range A1 and the moving range A in which the lecturer 100 moves,
The distance l of the distance traveled by the lecturer 100 is set as a picking range to prevent the lecture chair 100 from being subjected to hauling so that the lecturer 100 can freely move and transmit the lecture and sound without the microphone 1. [ Microphone device
The method of claim 1, wherein
The surface (s) reflectance of the collection plate 2 is provided with the collection plate 1 having a reflectance of 0.1 to 90%
Distant-collecting microphone device
The method of claim 1, wherein
And a sound collecting reflection plate (2b) is provided on the front surface of the microphone (1) by an appropriate distance (Y)
The remote ear picking-up device according to any one of claims 1 to 3, which is rotated in accordance with an acoustic direction in which the steel self-moves by engaging the upper, lower,
Characterized in that the structure of the collecting plate (2, 2a) of any one of claims 1 to 3 is constituted in both forward and backward directions,

Images