Audio Technica AT831b Bedienungsanleitung

AT831b

MINATURE CARDIOID CONDENSER MICROPHONE

FORM No. ATGC-L0151-08-E

Machida • Tokyo • Japan

SPECIFICATIONS

ELEMENT Fixed-change back plate permanently

polarized condenser

POLAR PATTERN Cardioid

FREQUENCY RESPONSE 40-20,000 Hz

OPEN CIRCUIT SENSITIVITY

(Phantom / Battery)

-44 dB (6.3 mV) /

-45 dB (5.6 mV) re 1V at 1 Pa

IMPEDANCE (Phantom / Battery) 200 ohms / 270 ohms

MAXIMUM INPUT SOUND LEVEL

(Phantom / Battery)

135 dB SPL / 121 dB SPL,

1 kHz at 1% T.H.D.

LOW FREQUENCY ROLL-OFF 80 Hz, 18 dB/octave

DYNAMIC RANGE (typical)

(Phantom / Battery)

106 dB / 92 dB,

1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO 65 dB, 1 kHz at 1 Pa

PHANTOM POWER REQUIREMENTS 11-52V DC, 2 mA typical

BATTERY TYPE 1.5V AA

BATTERY CURRENT / LIFE 0.4 mA / 1200 hours typical (alkaline)

SWITCH Off, on-at, roll-off

WEIGHT (less cable and accessories)

MICROPHONE

POWER MODULE

2.8 g

139 g

DIMENSIONS

MICROPHONE

POWER MODULE

25.0 mm - long, 10.2 mm - diameter

84.0 x 63.0 x 22.0 (mm) - H x W x D

OUTPUT CONNECTOR Integral 3-pin XLRM-type

CABLE 1.8 m long (permanently attached to

microphone), 2.6 mm diameter,

2-conductor, shielded cable with TA3F

output connector

ACCESSORIES FURNISHED AT8531 power module;

AT8417 clothing clip;

AT8444 instrument adapter;

AT8116 windscreens;

protective carrying case

10 dB

20k10k5k2k1k50020010050

8 kHz

200 Hz

1 kHz

5 kHz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

Polar Pattern

Frequency Response

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

Frequency in Hertz

LEGEND 12” or more on axis

Response in dB

Roll-off (MT830a)

- Clip-on lavalier mic provides crisp, full-sounding voice pickup

- Also excels as an instrument mic, especially for pickup of acoustic

guitar with included AT8444 instrument adapter

- Excellent gain before feedback and suppression of background

noise

- Switchable low-frequency roll-off

- Operates on battery or phantom power

For use as a lavalier, attach the microphone about 150mm below

the chin. Anticipate movements that may cause the microphone to

rub against or be covered by clothing, and position the microphone

to avoid it.

The AT831b requires 11-52V DC phantom power, or a 1.5V AA

battery for operation. A battery need not be in place for phantom

power operation.

Battery installation: Remove the cap from the top of the power

module. Insert a fresh 1.5V AA battery (“+” end toward the cap

release button), then reassemble the power module. Alkaline

batteries are recommended for longest life. Remove the battery

during long-term storage.

Output from the power module’s XLRM-type connector is low

impedance (Lo-Z) balanced. The signal appears across Pins 2 and

3; Pin 1 is ground (shield). Output phase is “Pin 2 hot” – positive

acoustic pressure produces positive voltage at Pin 2.

To avoid phase cancellation and poor sound, all mic cables must be

wired consistently: Pin 1-to-Pin 1, etc.

An integral 80 Hz high-pass filter provides easy switching from a

flat frequency response to a low-end roll-off. The roll-off position

reduces the microphone’s sensitivity to popping in close vocal use.

It also reduces the pickup of low-frequency ambient noise (such

as traffic, air-handling systems, etc.), room reverberation and

mechanically coupled vibrations..

The microphone is RoHS compliant–free from all substances

specied in the EU directive on hazardous substances.

Avoid leaving the microphone in the open sun or in areas where

temperatures exceed 43°C for extended periods. Extremely high

humidity should also be avoided.

FORM No. ATGC-L0151-08-C

Machida • Tokyo • Japan

小型心形指向性话筒

- 领带式小型话筒，提供清脆明亮和全音域的话音收音功能。

- 可使用在乐器收音上，配置AT8444结他夹持装置，可把话置

夹持在准确的收音位置，并能保护收音头及减低震动。

- 在增益收音的同时，仍有优秀的抗回音和减少背景噪音能

力。

- 内置高通滤波器选择，把低频噪声作出衰减而无损话音的收

音质量。

- 使用幻象供电或电池工作。

AT831b 是为戴在表演者衣服、领带上，在不防碍外观，但有

超卓收音效果而设计的超小型电容话筒。佩戴在领带时，请注

意把话筒夹持于颈下约150mm的位置。而为避免衣服碰到话筒

时产生的噪音，请注意话筒夹持的位置不要接触到其他衣服。

配有一个 AT8531 供电模组，需要提供11V至52V幻象供电

或1.5V AA电池操作，当使用幻象电源操作时，可以不安装电

池。

安装电池时，把供电模组顶部的电池盒盖打开，确认电池的极

性(跟随电池盒内的标记)，放入一枚新的1.5V AA电池，再盖

回电池盖。建议使用碱性电池，而长时间不使用时，请把电池

取出。

供电模组的XLRM卡农输出端为低阻抗平衡输出，话筒音频信

号最终以卡农公头的2号及3号针脚输出，而1号针脚则为地线

(屏蔽)连接。输出相位将以正相位电平设于2号针脚上。

为避免出现相位相互抵消而失真的情况，所有话筒连接时，接

线必需以1-1，2-2，3-3型式把针脚连接。

内置高质量高通滤波电路，可轻易由平直的频率响应，开启为

于80 Hz以下衰减的收音效果，应高通滤波器可减低话筒在近

距离讲话收音时的喷气声，并可减低收音环境中低频噪声(如外

间汔车引擎声，空调系统的风声等)，房间中的回声及机械性的

震动声。

话筒符合RoHS规格，在构造上不含有欧盟禁用的危害性物

质。

把话筒暴露于高温中可能导致输出电平逐渐及永久性减弱，应

避免将话筒留在日晒的地方或长时间置于温度超过43°C的地

方，而极高湿度也应避免。

AT831b

10 dB

20k10k5k2k1k50020010050

8 kHz

200 Hz

1 kHz

5 kHz

0°

330°

300°

270°

240°

210°

180°

150°

120°

90°

60°

30°

指向特性

频率特性

声压曲线1刻度5 dB

频率

频率 (赫兹)

电平平直

响应电平 (dB)

高通滤波 (MT830a)

技术指标

收音头固定充电背板，静电型电容式

指向特性心型指向性

频率响应 40-16,000 Hz

开通灵敏度 (幻象供电 /

电池)

-44 dB (6.3 mV) /

-45 dB (5.6 mV) 以 1V 于1 Pa

输出阻抗 (幻象供电 / 电池)200 欧姆 / 270 欧姆

最大输入声压 (幻象供电 /

电池)

135 dB SPL /

121 dB SPL, 1 kHz 于 1% T.H.D

高通滤波 80 Hz, 18 dB/octave

动态范围 (幻象供电 / 电池) 106 dB / 112 dB, 1 kHz 于最高声压

讯噪比 65 dB, 1V 于1 Pa

幻象供电直流 11-52V, 耗电 2 mA 典型

电池种类 1.5V AA型5号电池

耗电/电池寿命 0.4 mA / 1200小时 (碱性电池)

开关关闭、开启-平直、开启-高通滤波

重量(不带连线与配件)

话筒

供电模组

2.8 克

139 克

外形尺寸

话筒

供电模组

25.0 mm -长，10.2 mm -直径

84.0 x 63.0 x 22.0 (mm)-长x 宽x 高

输出连接器内置 XLRM-3针卡农公头

连线 1.8 m - 长，2.6 mm - 直径，

话筒固定连接，

2蕊屏蔽电线，以TA3F插头连接。

附属品 AT8531 供电模组；

AT8417 领带夹；

AT8444 乐器夹持装置；

AT8116 防风罩；

便携保护袋。

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