JPS6352520B2 - - Google Patents
Info
- Publication number
- JPS6352520B2 JPS6352520B2 JP11753880A JP11753880A JPS6352520B2 JP S6352520 B2 JPS6352520 B2 JP S6352520B2 JP 11753880 A JP11753880 A JP 11753880A JP 11753880 A JP11753880 A JP 11753880A JP S6352520 B2 JPS6352520 B2 JP S6352520B2
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- outputs
- present
- potentiometer
- microphone unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Stereophonic Arrangements (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
【発明の詳細な説明】
本発明は、収音する場所の中央に設置し、全周
囲の音を１個所にて収音できるマイクロホンを簡
単な構成で提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a microphone with a simple configuration that is installed in the center of a place where sound is collected and can collect all surrounding sounds at one location.
以下に本発明の一実施例について図面とともに
説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図はマイクロホンユニツトの配置を示して
いる。第１図において、１，２は互いに反対方向
に向けられた単一指向性マイクロホンユニツト、
３は、上記マイクロホンユニツト１に対して90゜
異なる方向に向けられた双指向性マイクロホンユ
ニツトである。 FIG. 1 shows the arrangement of the microphone unit. In FIG. 1, unidirectional microphone units 1 and 2 are oriented in opposite directions;
3 is a bidirectional microphone unit oriented in a direction 90° different from the microphone unit 1.
第２図は本実施例のマイクロホンのブロツク図
である。マイクロホンユニツト１，３，２の出力
はそれぞれインピーダンス変換器４，５，６を介
してポテンシヨメータ７，８，９に印加され、レ
ベルが調整される。上記ポテンシヨメータ７，
８，９は連動するものであり、各ポテンシヨメー
タ７，８，９の特性を第３図ａ，ｂ，ｃに示す。 FIG. 2 is a block diagram of the microphone of this embodiment. The outputs of microphone units 1, 3, and 2 are applied to potentiometers 7, 8, and 9 via impedance converters 4, 5, and 6, respectively, and their levels are adjusted. The above potentiometer 7,
8 and 9 are interlocked, and the characteristics of each potentiometer 7, 8, and 9 are shown in FIGS. 3a, b, and c.
第２図において、１０はポテンシヨメータ７，
８の出力を加算する加算器、１１はポテンシヨメ
ータ８，９の出力を加算する加算器、１２はポテ
ンシヨメータ７，８の出力を減算する減算器、１
３はポテンシヨメータ８，９の出力を減算する減
算器であり、上記加算器１０，１１、減算器１
２，１３より４つの出力１４，１５，１６，１７
が得られる。 In FIG. 2, 10 is a potentiometer 7,
11 is an adder that adds the outputs of potentiometers 8 and 9; 12 is a subtracter that subtracts the outputs of potentiometers 7 and 8;
3 is a subtracter for subtracting the outputs of the potentiometers 8 and 9;
4 outputs 14, 15, 16, 17 from 2, 13
is obtained.
第４図は本発明のマイクロホンの収音範囲を示
している。１８は本発明のマイクロホンであり、
第２図における出力１４，１５，１６，１７によ
りそれぞれ0゜〜90゜、0゜〜−90゜、90゜〜180゜、−9
0゜〜
180゜の範囲を収音できるものである。 FIG. 4 shows the sound collection range of the microphone of the present invention. 18 is a microphone of the present invention,
Outputs 14, 15, 16, and 17 in Figure 2 result in angles of 0° to 90°, 0° to -90°, 90° to 180°, and -9 respectively.
0゜～
It can pick up sound within a 180° range.
このように本発明は、双指向性マイクロホンユ
ニツト３を兼用し、マイクロホンユニツト１と３
で第１のＭ−Ｓ（Mid−Side）形ステレオマイク
ロホンが構成され、またマイクロホンユニツト２
と３で第２のＭ−Ｓ形マイクロホンが構成され、
この２つのＭ−Ｓ形マイクロホンの組合せによ
り、周囲360゜の収音が可能になるものである。ま
た連動するポテンシヨメータ７，８，９を調整す
ることにより、Ｌチヤンネルの最大感度軸を第４
図における0゜−90゜−180゜の任意の方向に設定する
ことができ、またＲチヤンネルの最大感度軸を第
４図における0゜−−90゜−180゜の任意の方向に設定
できるものである。またポテンシヨメータ７，
８，９を連続的に可変することにより、Ｌチヤン
ネルの最大感度軸を0゜→90゜→180゜に、またＲチヤ
ンネルの最大感度軸を0゜→−90゜→180゜に連続的に
変化させることができるものである。 In this way, in the present invention, the bidirectional microphone unit 3 is also used, and the microphone units 1 and 3
constitutes a first M-S (Mid-Side) type stereo microphone, and microphone unit 2 constitutes a first M-S (Mid-Side) type stereo microphone.
and 3 constitute a second M-S type microphone,
The combination of these two M-S type microphones makes it possible to collect sound from 360 degrees around. Also, by adjusting the interlocking potentiometers 7, 8, and 9, the maximum sensitivity axis of the L channel can be set to the fourth
It can be set in any direction from 0° to 90° to 180° in the figure, and the maximum sensitivity axis of the R channel can be set to any direction from 0° to 90° to 180° in Fig. 4. It is. Also potentiometer 7,
By continuously varying 8 and 9, the maximum sensitivity axis of the L channel can be changed continuously from 0° → 90° → 180°, and the maximum sensitivity axis of the R channel can be changed continuously from 0° → −90° → 180°. It is something that can be changed.
本発明は上記のような構成であり、周囲360゜の
収音がワンポイントで可能になり、円卓等での会
議のワンポイント録音、360゜立体画面に適した音
場ソースの提供が可能となる利点を有するもので
ある。また本発明では、１個の双指向性マイクロ
ホンユニツトを兼用し、２個の単一指向性マイク
ロホンユニツトとで２つのＭ−Ｓ形ステレオマイ
クロホンを構成するため、構成が簡単で安価なマ
イクロホンが得られるものである。 The present invention has the above-mentioned configuration, and it is possible to collect sound from a 360° surrounding area at one point, making it possible to record a meeting at a round table, etc., and to provide a sound field source suitable for a 360° stereoscopic screen. It has the following advantages. Furthermore, in the present invention, one bidirectional microphone unit is also used, and two M-S type stereo microphones are configured with two unidirectional microphone units, so a microphone with a simple configuration and low cost can be obtained. It is something that can be done.
第１図は本発明の一実施例におけるマイクロホ
ンユニツトの配置を示す図、第２図は同マイクロ
ホンのブロツク図、第３図ａ，ｂ，ｃは同マイク
ロホンに用いるポテンシヨメータの特性図、第４
図は同マイクロホンの収音範囲を示す図である。
１，２……単一指向性マイクロホンユニツト、
３……双指向性マイクロホンユニツト、４，５，
６……インピーダンス変換器、７，８，９……ポ
テンシヨメータ、１０，１１……加算器、１２，
１３……減算器。
Fig. 1 is a diagram showing the arrangement of a microphone unit in an embodiment of the present invention, Fig. 2 is a block diagram of the same microphone, Figs. 3 a, b, and c are characteristic diagrams of the potentiometer used in the microphone. 4
The figure shows the sound collection range of the same microphone. 1, 2...unidirectional microphone unit,
3... Bidirectional microphone unit, 4, 5,
6... Impedance converter, 7, 8, 9... Potentiometer, 10, 11... Adder, 12,
13...Subtractor.
Claims (1)
１、第２のマイクロホンユニツトと、この第１、
第２のマイクロホンユニツトの向きに対して90゜
異なる方向に向けられた双指向性の第３のマイク
ロホンと、上記第１、第３のマイクロホンユニツ
トの出力を加算する第１の加算器と、上記第２、
第３のマイクロホンユニツトの出力を加算する第
２の加算器と、上記第１、第３のマイクロホンユ
ニツトの出力を減算する第１の減算器と、上記第
２、第３のマイクロホンユニツトの出力を減算す
る第２の減算器とを具備してなるマイクロホン。1 unidirectional first and second microphone units directed in opposite directions;
a bidirectional third microphone oriented in a direction 90° different from the direction of the second microphone unit; a first adder that adds the outputs of the first and third microphone units; Second,
a second adder that adds the outputs of the third microphone unit; a first subtracter that subtracts the outputs of the first and third microphone units; A microphone comprising a second subtracter for subtracting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11753880A JPS5742296A (en) | 1980-08-26 | 1980-08-26 | Microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11753880A JPS5742296A (en) | 1980-08-26 | 1980-08-26 | Microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5742296A JPS5742296A (en) | 1982-03-09 |
| JPS6352520B2 true JPS6352520B2 (en) | 1988-10-19 |
Family
ID=14714268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11753880A Granted JPS5742296A (en) | 1980-08-26 | 1980-08-26 | Microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5742296A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH067660Y2 (en) * | 1984-03-09 | 1994-02-23 | 日本ビクター株式会社 | Stereo microphone |
| US4622440A (en) * | 1984-04-11 | 1986-11-11 | In Tech Systems Corp. | Differential hearing aid with programmable frequency response |
| JPS62119092U (en) * | 1986-01-21 | 1987-07-28 | ||
| JPH01238399A (en) * | 1988-03-18 | 1989-09-22 | Nippon Telegr & Teleph Corp <Ntt> | Stereo sound collecting system |
-
1980
- 1980-08-26 JP JP11753880A patent/JPS5742296A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5742296A (en) | 1982-03-09 |
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