Audio-Technica AT871UG Manual

Audio-Technica Mikrofon AT871UG

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Side 1/2

UNIDIRECTIONAL CONDENSER

BOUNDARY MICROPHONE

- Designed for surface-mount

applications such as high-quality

sound reinforcement, professional

recording, television, conferencing

and other demanding sound

pickup situations.

- UniGuardTM RFI-shielding

technology offers outstanding

rejection of radio frequency

interference(RFI).

- Superior off-axis rejection for

maximum gain before feedback.

- Small-diameter UniPoint capsule near boundary eliminates phase

distortion and delivers clear, high-output performance.

- Heavy die-cast case and non-silp silicon foam bottom pads

minimize coupling of surface vibration to the microphone.

- Low-prole design with low-reectance nish for minimum visibility.

- AT871UG has contained electronics eliminate need for external

power module.

- The AT871UG requires 9V to 52V phantom power for operation

only.

Supplied as a cardioid, AT871UG accepts interchangeable elements

to permit selection of angle of acceptance from 100 to 360° °.

Positioning a properly designed miniature cardioid microphone

centrally on a large, at, unobstructed surface yields several distinct

advantages. Directionality is increased by 3dB, promoting enhanced

gain before feedback and further suppression of ambient noise.

Sensitivity is increased for improved signal to noise ratio. Phase

distortion due to reflected sound energy from boundary itself is

eliminated.

The microphone should be placed on a at,

unobstructed mounting surface, with the

front of the microphone facing the sound

source. The sound source should not be

below, or high than 60 above, the plane of °

the mounting surface.

Output from 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.

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-L0173-10-E

Machida • Tokyo • Japan

SPECIFICATIONS

ELEMENT Fixed-charge back plate

permanently polarized condenser

POLAR PATTERN Half-cardioid (cardioid in hemisphere

above mounting surface)

FREQUENCY RESPONSE 30-20,000 Hz

OPEN CIRCUIT SENSITIVITY -33 dB (19.9 mV) re 1V at 1 Pa

IMPEDANCE 200 ohms

MAXIMUM INPUT SOUND LEVEL 130 dB SPL, 1 kHz at 1% T.H.D.

DYNAMIC RANGE (typical) 103 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO 67 dB, 1 kHz at 1Pa

PHANTOM POWER REQUIREMENTS 9-52V DC, 2 mA typical

WEIGHT (less cable) 415 g

DIMENSIONS 120.0 mm - maximum width,

145.0 mm - maximum length,

17 mm - height

OUTPUT CONNECTOR TB3M-type

CABLE 7.6m long, 3.2mm diameter, 2-con-

ductor shielded cable with TA3F-type

connector and XLRM-type connectors.

OPTIONAL INTERCHANGEABLE

ELEMENTS

AT853H-ELE hypercardioid (100°)

AT853C-ELE cardioid (120°)

AT853SC-ELE subcardioid (170°)

AT853O-ELE omnidirectional (360°)

ACCESSORIES FURNISHED Soft protective pouch

IDEAL

WORKING

ANGLE

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

Optional Accessories:

AT8201 line matching transformer (Lo-z to

50,000 ohms)

AT8202 adjustable in-line attenuator for

use with balanced Lo-Z microphones.

AT8506 four-channel 48V phantom power

supply (AC powered).

AT8801/EU single-channel 48V phantom

power supply (AC powered).

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)

FORM No. ATGC-L0173-10-C

Machida • Tokyo • Japan

单指向性平面式电容话筒

- 设计在平面放置应用，提供高

质量收音、会议、专业录音、

及其他高要求的收音应用。

- UniGuard™ - 射频干扰(RFI)

屏敝技术，提供杰出的防止射

频干扰能力，避免收音时受到

如手提电话等的干扰。

- 半球形单一指向性，可抑制后

方杂音而清楚地在前方收音。

- 细小的UniPoint系列收音头，可消除反射式相位失真，并提

供清晰及高信号的音频输出。

- 平放不显眼的设计，并涂上低反光的颜色涂料。

- 以压模铸造的坚固外壳及话筒底部的防滑矽泡棉可减低桌，

面震动对话筒的影响。

- 平放不显眼的设计，并涂上低反光的颜色涂料。

- AT871UG 内置话筒前置放大器供电组件，无需使用外置供

电模组。

- AT871UG 话筒只作直流9V 至

52V 幻象供电操作。

标准为心形指向配置，但可选配适合的收音头更换配合实际的

应用，收音角度可由100°至360°

特别的平面设计，将话筒放置在一个宽阔平面的中央位置上，可

因声音的反射效果而使音量增加，并同时提高讯噪比及能减3dB

低因相位移动而形成的失真，改善音质。

话筒应放置在平面上及没有阻碍，

物的环境使用音源应在话筒的前。

方发声理想的收音角度应在平面，

至60°高度之内。

低阻抗的平衡音频输出，音频信号最终以卡农公头的话筒 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。

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。

技术指标

收音头固定充电背板，静电型电容式

指向特性半球形心形单指向性

频率响应 30-20,000 Hz

开通灵敏度 -34 dB (19.9 mV) 以 1V 于 1 Pa

输出阻抗 200 欧姆

最大承受声压 133 dB, 1 kHz 于 1% T.H.D.

动态范围 (典型) 103 dB, 1 kHz 于最高声压

讯噪比 67 dB, 1 kHz 于 1Pa

幻象供电直流 9-52V，耗电 2 mA 典型

重量 415 克

外形尺寸 120.0 mm - 最大寬度,

145.0 mm - 最大长度

17 mm - 高

输出连接器 TB3M-3针卡农公座

连接线 7.6m 长，3.2 mm 直径连接线，2

蕊线连屏蔽电线，以TA3F插头连接

及3针卡农公头插头。

可转换收音头 AT853H-ELE 超心形指向 (100°)

AT853C-ELE 心形指向 (120°)

AT853SC-ELE 准心形指向

(170°)

AT853O-ELE 全方向性 (360°)

附属品保護袋

理想的

收音角度

选择配件:

AT8201 话筒线路匹配变压器

(

低阻抗至

50,000 欧姆)。

AT8202 可选式话筒衰减器。

AT8506 四通通

48V幻象供电器 (

交流供

电)。

AT8801/EU 单通道48V幻象供电器 (交

流供电)。

Produkt Specifikationer

Mærke:	Audio-Technica
Kategori:	Mikrofon
Model:	AT871UG

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