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• Microphones for Television

• Microphones from Nevaton
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• Microphones from DPA Microphones A/S
• Accessory kits for Type 4071 DPA lavaliere microphone
• Electro-Voice special purpose microphones
• Neumann Microphones
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• Sennheiser lavaliere microphones
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• Sennheiser wireless systems
• Rode and Shure microphones for radio and television
• Reporting and clip-on microphones in television production
• Studio condenser microphones from Studio Project

625 Content: 2002 : #8

Audiotechnica microphones
Alexey Sgibnev

The AT 815 b and AT 835 b microphones are manufactured and offered by the Japanese Audiotechnica specifically for on-camera applications.

The gradient condenser microphone AT 815 b is intended for use in acoustically problematic environments. Its hyper-cardioid polar pattern makes it possible to avoid unwanted side-noise influence, thus gaining better signal intelligibility. The microphone features a switchable low-frequency roll-off filter. The light weight makes operating the microphone, attached to the camera, convenient and easy. It is powered by a 1.5 V battery or 9 to 52 V phantom power supply unit.

Major features:

frequency range - 30...20000 Hz;
sensitivity - 12.5 mV/Pa;
electrical impedance - 600 ohms.

The AT 835 b microphone is designed for professional recording, broadcasting and film/TV/video production. It has a little wider pick-up angle vs. the AT 815 b, which makes it easy for the cameraman to follow moving sound sources. Like the above-mentioned AT 815 b, it is powered by either a 1.5 V battery or phantom power supply unit and has a switchable low-frequency cut-off filter. Specifications, in brief:

frequency range - 40...20000 Hz;
sensitivity - 12.5 mV/Pa;
electrical impedance - 600 Ohms.

Since 2002, the very same models are available in stereo modification, i.e. the AT 815 ST and AT 835 ST, each having four selectable patterns: mid (sound source in front of the microphone), side (with L/R side signals being picked up, central omitted), Ir-w (stereo-wide) and Ir-n (stereo-narrow). The microphones deliver high sound quality in stereo mode recording.

Technical specifications of the models, in brief:

polar patterns - linear-cardioid, figure-8;
frequency range - 30...20000 Hz (AT815ST), 40...20000 Hz (AT835ST);
buss-cut filter-12 dB/octave below 80 Hz;
sensitivity (mid/side/lr stereo) - 31.6/19.9/15.8 mV/Pa;
electrical impedance - 200 Ohms;
S/N ratio (mid/side/lr stereo) - 72/68/70 dB;
dynamic range (mid/side/lr stereo) - 101/101/102 dB;
phantom power - 11...52 V.

AT835b microphone

MixArt Company.

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