Audio Technica AT815b Bedienungsanleitung

200 Hz

1 kHz

5 kHz

8 kHz

LEGEND

Same as 5 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

120

150

210

240

270

300

330

180

LEGEND

Roll-off

12" or more on axis (flat)

Frequency in Hertz

Response in dB

10 dB

20k

10k

500

200

100

Frequency Response

• Designed for video production and broadcast (ENG/EFP) audio

acquisition

•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 AT815b requires 9V to 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: Unscrew the lower section of the microphone

body, just below the nameplate. Insert a fresh 1.5V AA battery

in the handle compartment (“+” end up), then reassemble the

microphone. Alkaline batteries are recommended for longest life.

Remove the battery during long-term storage.

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 180 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.

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

temperatures exceed 110° F (43° C) for extended periods.

Extremely high humidity should also be avoided.

AT815b SPECIFICATIONS†

ELEMENT Fixed-charge back plate

permanently polarized

condenser

POLAR PATTERN Line + gradient

FREQUENCY RESPONSE 30-20,000 Hz

LOW-FREQUENCY ROLL-OFF 180 Hz, 12 dB/octave

OPEN CIRCUIT SENSITIVITY –38 dB (12.5 mV) /

(Phantom / Battery) –39 dB (11.2 mV) re 1V at 1 Pa*

IMPEDANCE (Phantom / Battery) 500 ohms / 600 ohms

MAXIMUM INPUT SOUND LEVEL 130 dB / 115 dB SPL,

(Phantom / Battery) 1 kHz at 1% T.H.D.

SIGNAL-TO-NOISE RATIO170 dB, 1 kHz at 1 Pa*

DYNAMIC RANGE (typical) 106 dB / 91 dB,

(Phantom / Battery) 1 kHz at Max SPL

PHANTOM POWER 9-52V DC, 2 mA typical

REQUIREMENTS

BATTERY TYPE 1.5V AA/UM3

BATTERY CURRENT / LIFE 0.4 mA / 1200 hours typical

SWITCH Flat, roll-off (recessed)

WEIGHT (less accessories) 7.1 oz (200 g)

DIMENSIONS 18.11" (460.0 mm) long,

0.83" (21.0 mm) diameter

OUTPUT CONNECTOR Integral 3-pin XLRM-type

ACCESSORIES FURNISHED AT8405a stand clamp for 5/8"-27

threaded stands; windscreen;

battery; protective carrying case

†In the interest of standards development, A.T.U.S. offers full details on its test

methods to other industry professionals on request.

*1 Pascal = 10 dynes/cm2= 10 microbars = 94 dB SPL

1Typical, A-weighted, using Audio Precision System One.

Specifications are subject to change without notice.

Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224

Audio-

Technica Limited, Old Lane, Leeds LS11 8AG England

www.audio-technica.com

AT815b LINE + GRADIENT CONDENSER MICROPHONE

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