Audio Technica AT897 (Line + Gradient Conderser Microphone)

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  • Designed for video production and broadcast (ENG/EFP) audio acquisition
  • Short length (279mm) ensures mic stays out of the shot – even when used with compact digital cameras
  • Smooth, natural-sounding on-axis audio quality
  • Provides the narrow acceptance angle desirable for long-distance sound pickup
  • Excellent sound rejection from the sides and rear of mic
  • Switchable low-frequency roll-off
  • Operates on battery or phantom power

The AT897 requires 11V to 52V DC phantom power or a 1.5V AA battery for operation. A battery need not be in place for phantom power operation.

Output from the microphone’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.

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 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 specified in the EU directive on hazardous substances.

AT897 Specifications
Element
Fixed-charge back plate, permanently polarized condenser
Polar Pattern
Line + gradient
Frequency Response
20~20,000 Hz
Low Frequency Roll-Off
80 Hz, 12 dB/octave
Open Circuit Sensitivity
Phantom: -40 dB (10.0 mV) re 1V at 1 Pa Battery: -41 dB (8.9 mV) re 1V at 1 Pa
Impedance
Phantom: 200 ohms Battery: 300 ohms
Maximum Input Sound Level
Phantom: 129 dB SPL, 1 kHz at 1% T.H.D. Battery: 115 dB SPL, 1 kHz at 1% T.H.D.
Dynamic Range (Typical)
Phantom: 112 dB, 1 kHz at Max SPL Battery: 98 dB, 1 kHz at Max SPL
Signal-To-Noise Ratio
77 dB, 1 kHz at 1 Pa
Phantom Power Requirements
11~52V DC, 2 mA typical
Battery Type
1.5V AA/UM3
Battery Current / Life
0.4 mA / 1200 hours typical (alkaline)
Switch
Flat, roll-off (recessed)
Weight
145g
Dimensions
21mm X 279mm (Diameter X Long)
Output Connector
Integral 3-pin XLRM-type
Accessories Furnished
AT8405a stand clamp for ⅝”-27 threaded stands;
AT8134 foam windscreen;
⅝”-27 to ⅜”-16 threaded adapter;
battery; protective carrying case

 


超窄指向性電容咪高峰

  • 專為影視製作和廣播採訪(ENG/EFP)的音頻收音而設計。
  • 較短的長度設計(279mm),可安裝於小型數位攝像機使用。
  • 平滑、自然的收音效能,和優越的音頻品質。
  • 提供窄角度的超指向性能,給與遠距離的收音效果。
  • 由咪高峰兩旁到後方均有極佳抗噪音能力。
  • 設有高通濾波開關。
  • 可以使用電池或幻象供電工作。

AT897咪高峰需使用11V至52V幻象供電或1.5V AA電池工作,當使用幻象電源時,可以不安裝電池。

咪高峰的XLRM卡農輸出端為低阻抗平衡輸出,咪高峰音頻信號最終以卡農公頭的2號及3號針腳輸出,而1號針腳則為地線(遮罩)連接。輸出相位將以正相位電平設於2號針腳上。

內置高通濾波電路,可輕易由平直的頻率響應,開啟為於80Hz以下衰減的收音效果,應用高通濾波器可減低收音環境中低頻雜訊(如外間汔車引擎聲,空調系統的風聲等),房間中的回聲及機械性的震動聲。

咪高峰符合RoHS規格,在構造上不含有歐盟禁用的危害性物質。

AT897 産品規格
元件
固定充電背板,靜電型電容式
指向性
超窄指向性
頻率響應
20~20,000 Hz
高通濾波
80 Hz, 12 dB/octave
開通靈敏度
幻象電源:-40 dB (10.0 mV) re 1V at 1 Pa 電池供電:-41 dB (8.9 mV) re 1V at 1 Pa
阻抗
幻象電源: 200 歐姆 電池供電: 300 歐姆
最大輸入聲壓級
幻象電源: 129 dB 聲壓,1 kHz 於 1% T.H.D. 電池供電: 115 dB 聲壓,1 kHz 於 1% T.H.D.
動態範圍 (一般)
幻象電源:112 dB,1 kHz 於最高聲壓 電池供電:98 dB,1 kHz 於最高聲壓
訊噪比
77 dB, 1 kHz 於 1 Pa
幻象供電
直流 11~52V,2 mA 典型耗電
電池
1.5V AA型電池
電池耗電 / 壽命
0.4 mA / 1200 小時 (鹼性電池)
開關
平直, 高通濾波 (凹槽開關)
重量
145g
尺寸
279.0 mm 長, 21.0 mm 直徑
輸出接口
內置三針XLRM卡農公頭
隨機附件
AT8405a ⅝”-27接頭轉軸式支架;
AT8134 海棉防風罩;
⅝”-27至⅜”-16轉接頭;
電池;便攜袋

 


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