JPH11239392A - Wireless microphone - Google Patents

Wireless microphone

Info

Publication number
JPH11239392A
JPH11239392A JP5598498A JP5598498A JPH11239392A JP H11239392 A JPH11239392 A JP H11239392A JP 5598498 A JP5598498 A JP 5598498A JP 5598498 A JP5598498 A JP 5598498A JP H11239392 A JPH11239392 A JP H11239392A
Authority
JP
Japan
Prior art keywords
microphone
wireless microphone
sound
frequency amplifier
circuit
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.)
Pending
Application number
JP5598498A
Other languages
Japanese (ja)
Inventor
Junji Abe
淳司 阿部
Ryosuke Nabeya
亮介 鍋谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP5598498A priority Critical patent/JPH11239392A/en
Publication of JPH11239392A publication Critical patent/JPH11239392A/en
Pending legal-status Critical Current

Links

Landscapes

  • Details Of Audible-Bandwidth Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Transmitters (AREA)

Abstract

PROBLEM TO BE SOLVED: To use a microphone for a speech and a vocal through the changeover of a changeover section provided to the microphone itself. SOLUTION: The microphone is provided with a sound collection section 1 that transduces a voice signal into an electric signal, a low frequency amplifier section 2 that amplifies the voice signal outputted from the sound collection section 1, and a changeover section 9 that is placed between the sound collection section 1 and the low frequency amplifier section 2 and selects a 1st circuit whose one terminal connects via a 1st capacitor or a 2nd circuit whose other terminal connects to series connection consisting of a 2nd capacitor and a resistor.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明はワイヤレスマイクロ
ホンに係り、特にマイクロホン本体にてスピーチとボー
カルとを切替えることができる使い勝手の良いワイヤレ
スマイクロホンに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless microphone, and more particularly to an easy-to-use wireless microphone capable of switching between speech and vocal with a microphone body.

【0002】[0002]

【従来の技術】近年、会議及び論文発表など大衆に資料
を提示しつつ発言するためには使い勝手の良いワイヤレ
スマイクロホンが使用されていることは周知のことであ
る。
2. Description of the Related Art In recent years, it is well known that an easy-to-use wireless microphone is used for presenting a material to a public such as a conference or a paper presentation while speaking.

【0003】一般にこの種のワイヤレスマイクロホンと
しては、講演会等で用いるスピーチ用及びカラオケ等で
用いるボーカル用に2分されており、ユーザは2種類の
マイクロホンを用意して夫々の用途に合わせて適宜利用
するのが現状である。
[0003] Generally, this type of wireless microphone is divided into two parts, one for speech used in a lecture or the like and the other for vocals used in karaoke, and the user prepares two types of microphones and appropriately prepares them according to each application. It is currently used.

【0004】図4は一般的なワイヤレスマイクロホンの
構成を示すブロック図である。音声は集音部1で電気信
号である音声信号に変換され、低周波増幅回路2に供給
される。この低周波増幅回路2で増幅された音声信号
は、トーンスケルチ用のトーン発振回路3にて生成され
るトーン信号と混合された後発振変調回路4に供給され
る。この発振変調回路4は入力された音声信号及びトー
ン信号にて発振搬送波を変調して出力する。この変調さ
れた搬送波は高周波増幅回路5に供給され、所定の電力
に増幅された後、アンテナ6より送信される。また、7
は電源制御回路でありワイヤレスマイクロホン全体の電
源電圧を電源8をもとに生成している。なお、トークス
イッチは電源制御回路7に接続され、そのON/OFFに
よりアンテナ6より音声信号が送信されるのである。
FIG. 4 is a block diagram showing a configuration of a general wireless microphone. The sound is converted into a sound signal, which is an electric signal, by the sound collection unit 1 and supplied to the low frequency amplifier circuit 2. The audio signal amplified by the low-frequency amplifier circuit 2 is supplied to an oscillation modulation circuit 4 after being mixed with a tone signal generated by a tone oscillation circuit 3 for tone squelch. The oscillation modulation circuit 4 modulates the oscillation carrier with the input voice signal and tone signal and outputs the result. The modulated carrier is supplied to the high frequency amplifier circuit 5, amplified to a predetermined power, and transmitted from the antenna 6. Also, 7
A power supply control circuit generates a power supply voltage for the entire wireless microphone based on the power supply 8. The talk switch is connected to the power supply control circuit 7, and an audio signal is transmitted from the antenna 6 by ON / OFF of the talk switch.

【0005】また、例えば実開昭61−176896号
公報に示されるように、一つのマイクロホンを用いて増
幅器のとの間に切替え装置を接続してボーカル及びスピ
ーチを切替えて適宜出力する装置も提案されている。
Further, as disclosed in Japanese Utility Model Application Laid-Open No. Sho 61-176896, for example, a switching device is connected between a microphone and an amplifier by using one microphone, and vocal and speech are switched and output as appropriate. Have been.

【0006】[0006]

【発明が解決しようとする課題】従来のワイヤレスマイ
クロホンとしてのスピーチ用ワイヤレスマイクロホン
は、一般的には講演、演説用として音声信号の周波数成
分のうち比較的低い成分を抑制して、音声の明瞭度に重
点をおいたものである。
A conventional wireless microphone for speech as a wireless microphone generally suppresses a relatively low frequency component of a frequency component of an audio signal for a lecture or a speech, so that the clarity of the audio is reduced. The emphasis is on

【0007】また、カラオケ等の歌声用としたボーカル
用のワイヤレスマイクロホンは、音声信号の周波数特性
を低域成分、通常100Hz以下で低減させることなく増
幅し、しかも大きな音声入力にも歪みの発生を抑えるた
め、増幅度を周波数成分全域にわたって低減した特性を
備えているものであり、両者は特性が異なる。
Also, a vocal wireless microphone for singing voices such as karaoke amplifies the frequency characteristics of an audio signal without reducing it to low-frequency components, usually 100 Hz or less, and causes distortion even in a large audio input. In order to suppress this, it has a characteristic in which the degree of amplification is reduced over the entire frequency component range, and both have different characteristics.

【0008】従って、用途によって特性の異なるマイク
ロホンが不可欠である以上、スピーチ用及びボーカル用
と2種類のマイクロホンを用意せねばならず、これはコ
スト高となり甚だ不便である。このためマイクロホン本
体の筐体自体を機械的に調整して共用することも考えら
れるが、構造が複雑となり、勢いコスト高となるばかり
かマイクロホンとしての所期の性能を維持することが困
難となる。
Therefore, since microphones having different characteristics are indispensable depending on the use, two types of microphones, one for speech and one for vocals, must be prepared, which is costly and inconvenient. For this reason, it is conceivable to mechanically adjust and share the microphone body itself, but the structure becomes complicated, which not only increases the momentum cost but also makes it difficult to maintain the expected performance of the microphone. .

【0009】また、実開昭61−176896号公報に
示されるものは、装置が大型となりコスト高となること
は勿論のこと、使い勝手の悪いものである。
The apparatus disclosed in Japanese Utility Model Laid-Open Publication No. Sho 61-176896 is not only inconvenient in that it is large in size and expensive, but also inconvenient.

【0010】[0010]

【課題を解決するための手段】本発明は上記課題を解決
するために、音声を電気信号に変換する集音部と、前記
集音部から出力される音声信号を増幅する低周波増幅部
と、前記集音部と前記低周波増幅部との間に配置されて
おり、一方の端子が第1のコンデンサを介して接続され
る第1の回路と、他方の端子が第2のコンデンサと抵抗
とを直列接続した第2の回路とを切替える切替部とを有
するワイヤレスマイクロホンを提供するものである。
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a sound collecting unit for converting a sound into an electric signal, and a low frequency amplifying unit for amplifying a sound signal output from the sound collecting unit. A first circuit connected between the sound collection unit and the low-frequency amplification unit, one terminal of which is connected via a first capacitor, and the other terminal of which is connected to a second capacitor and a resistor. And a switching unit for switching between a second circuit and a second circuit connected in series.

【0011】さらに、前記集音部と前記切替部との間に
接地抵抗を備えて切替部を切替えた時に生じるインピー
ダンスの変動を抑制し得ることができるワイヤレスマイ
クロホンを提供するものである。
It is another object of the present invention to provide a wireless microphone which is provided with a grounding resistor between the sound collecting unit and the switching unit and can suppress a change in impedance caused when the switching unit is switched.

【0012】[0012]

【発明の実施の形態】図1は本発明のワイヤレスマイク
ロホンの一実施例を示すブロック図、図2はワイヤレス
マイクロホンの外観図である。
FIG. 1 is a block diagram showing an embodiment of a wireless microphone according to the present invention, and FIG. 2 is an external view of the wireless microphone.

【0013】本発明のワイヤレスマイクロホンによれ
ば、基本的には上記従来と同様に構成されているので従
来と同一の構成部分には同一の符号を付して説明する。
According to the wireless microphone of the present invention, since it is basically configured in the same manner as the above-described conventional one, the same components as in the conventional one will be described with the same reference numerals.

【0014】即ち、音声は集音部1で電気信号である音
声信号に変換後に切替部9を介して、低周波増幅回路2
に供給される。この切替部9の一方の端子aはコンデン
サ10を介して上記低周波増幅回路2に接続され、また
他方の端子はコンデンサ11と直列接続された抵抗12
を介して上記低周波増幅回路2にともに接続されてい
る。そして、この低周波増幅回路2で増幅された音声信
号は、トーンスケルチ用のトーン発振回路3にて生成さ
れるトーン信号と混合された後発振変調回路4に供給さ
れる。この発振変調回路4は入力された音声信号及びト
ーン信号にて発振搬送波を変調して出力する。この変調
された搬送波は高周波増幅回路5に供給され、所定の電
力に増幅された後、アンテナ6より送信される。
That is, the sound is converted into an electric signal, which is an electric signal, by the sound collecting unit 1, and then the low-frequency amplifier circuit 2
Supplied to One terminal a of the switching unit 9 is connected to the low frequency amplifier circuit 2 via a capacitor 10, and the other terminal is a resistor 12 connected in series with the capacitor 11.
Are connected to the low frequency amplifying circuit 2 via the. The audio signal amplified by the low-frequency amplifier circuit 2 is supplied to an oscillation modulation circuit 4 after being mixed with a tone signal generated by a tone oscillation circuit 3 for tone squelch. The oscillation modulation circuit 4 modulates the oscillation carrier with the input voice signal and tone signal and outputs the result. The modulated carrier is supplied to the high frequency amplifier circuit 5, amplified to a predetermined power, and transmitted from the antenna 6.

【0015】また、7は電源制御回路でありワイヤレス
マイクロホン全体の電源電圧を電源8をもとに生成して
いる。なお、トークスイッチは電源制御回路7に接続さ
れ、そのON/OFFによりアンテナ6より音声信号が
送信される。なお、13は集音部1と切替部9との間に
挿入された接地された抵抗(負荷抵抗)であり、切替部
9を切替えたときに生じるインピーダンスの変動を抑制
するものである。
A power supply control circuit 7 generates a power supply voltage for the entire wireless microphone based on a power supply 8. The talk switch is connected to the power supply control circuit 7, and an audio signal is transmitted from the antenna 6 by ON / OFF. Reference numeral 13 denotes a grounded resistance (load resistance) inserted between the sound collection unit 1 and the switching unit 9 for suppressing a change in impedance that occurs when the switching unit 9 is switched.

【0016】上記切替部9としては例えばスライドスイ
ッチが用いられており、マイクロホン本体14の筐体1
4a内に収納する態様が採用されており、電源(電池)
等を交換するときのみ露出するようになっているため、
不容易に切替わることはない。
As the switching unit 9, for example, a slide switch is used, and the housing 1 of the microphone body 14 is used.
4a, the power supply (battery)
Because it is exposed only when exchanging etc.
There is no easy switching.

【0017】ここで、切替部9を図示の如く、一方の端
子aに切替えて第1の回路に接続すことによりスピーチ
用のマイクロホンとして、音声信号の周波数成分のうち
比較的低い成分(通常300Hz付近以下)を低減させる
よう周波数増幅回路2の特性を図3中線Sで示す特性と
して、明瞭な音声を得ることができる。
Here, as shown in the figure, the switching unit 9 is switched to one terminal a and connected to the first circuit, so that a relatively low component (usually 300 Hz) of the frequency components of the audio signal is used as a microphone for speech. The characteristic of the frequency amplifying circuit 2 is set as the characteristic indicated by the line S in FIG.

【0018】また、切替部9を他方の端子b側に切替え
て第2の回路側に接続することによりボーカル用のマイ
クロホンとして、大きな音声入力にも歪みの発生を抑え
低域特性に変化を持たせることができる。
Further, by switching the switching section 9 to the other terminal b side and connecting it to the second circuit side, a vocal microphone suppresses the generation of distortion even in a large voice input and has a change in low-frequency characteristics. Can be made.

【0019】[0019]

【発明の効果】以上述べてきたように、本発明のワイヤ
レスマイクロホンによれば、マイクロホン自体に設けた
切替部の切替により、スピーチ用として明瞭な音声を得
ることができるのは当然のことであり、ボーカル用とし
て歪みの少ない大きな声に耐えるよう、マイクロホンの
周波数特性並びに感度を同時に切替えることができる効
果がある。
As described above, according to the wireless microphone of the present invention, it is natural that a clear sound can be obtained for speech by switching the switching unit provided in the microphone itself. In addition, there is an effect that the frequency characteristics and sensitivity of the microphone can be simultaneously switched so as to endure a loud voice with little distortion for vocals.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明のワイヤレスマイクロホンの一実施例を
示すブロック図である。
FIG. 1 is a block diagram showing an embodiment of a wireless microphone according to the present invention.

【図2】本発明のワイヤレスマイクロホンの構造を示す
外観図である。
FIG. 2 is an external view showing the structure of the wireless microphone of the present invention.

【図3】スピーチ用及びボーカル用に切替えた時の特性
を示す図である。
FIG. 3 is a diagram showing characteristics when switching between speech and vocal.

【図4】従来のワイヤレスマイクロホンを示すブロック
図である。
FIG. 4 is a block diagram showing a conventional wireless microphone.

【符号の説明】[Explanation of symbols]

1…集音部、2…低周波増幅回路、4…発振変調回路、
5…高周波増幅回路、6…アンテナ、9…切替部。
Reference numeral 1 denotes a sound collecting unit, 2 denotes a low frequency amplifier circuit, 4 denotes an oscillation modulation circuit,
5 ... high frequency amplifier circuit, 6 ... antenna, 9 ... switching unit.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】音声を電気信号に変換する集音部と、前記
集音部から出力される音声信号を増幅する低周波増幅部
と、前記集音部と前記低周波増幅部との間に配置されて
おり、一方の端子が第1のコンデンサを介して接続され
る第1の回路と、他方の端子が第2のコンデンサと抵抗
とを直列接続した第2の回路とを切替える切替部とを有
するワイヤレスマイクロホン。
A sound collector for converting a sound into an electric signal; a low-frequency amplifier for amplifying a sound signal output from the sound collector; and a low-frequency amplifier between the sound collector and the low-frequency amplifier. A switching unit that is disposed and has one terminal connected to a first circuit connected via a first capacitor, and the other terminal switched between a second circuit in which a second capacitor and a resistor are connected in series; Wireless microphone with a.
【請求項2】前記集音部と前記切替部との間に接地抵抗
を備えた請求項1記載のワイヤレスマイクロホン。
2. The wireless microphone according to claim 1, further comprising a ground resistor between the sound collection unit and the switching unit.
JP5598498A 1998-02-20 1998-02-20 Wireless microphone Pending JPH11239392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5598498A JPH11239392A (en) 1998-02-20 1998-02-20 Wireless microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5598498A JPH11239392A (en) 1998-02-20 1998-02-20 Wireless microphone

Publications (1)

Publication Number Publication Date
JPH11239392A true JPH11239392A (en) 1999-08-31

Family

ID=13014357

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5598498A Pending JPH11239392A (en) 1998-02-20 1998-02-20 Wireless microphone

Country Status (1)

Country Link
JP (1) JPH11239392A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008131374A (en) * 2006-11-21 2008-06-05 Tamura Seisakusho Co Ltd Wireless microphone transmitter, receiver and system
JP2008278003A (en) * 2007-04-26 2008-11-13 Matsushita Electric Ind Co Ltd Audio signal processing apparatus
JP2010068364A (en) * 2008-09-12 2010-03-25 Audio Technica Corp Capacitor microphone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008131374A (en) * 2006-11-21 2008-06-05 Tamura Seisakusho Co Ltd Wireless microphone transmitter, receiver and system
JP4705556B2 (en) * 2006-11-21 2011-06-22 株式会社タムラ製作所 Wireless microphone transmitter, receiver and system
JP2008278003A (en) * 2007-04-26 2008-11-13 Matsushita Electric Ind Co Ltd Audio signal processing apparatus
JP2010068364A (en) * 2008-09-12 2010-03-25 Audio Technica Corp Capacitor microphone

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