Audio Technica ES947 Specifications

ES947 & ES947W
Cardioid Condenser Boundary Microphones
Features
• Mounts unobtrusively in table-tops, ceilings and wall panels
• Low-profile element provides uniform cardioid polar pattern with
120º acceptance angle
• UniGuard RFI-shielding technology offers outstanding rejection
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of radio frequency interference (RFI)
• Self-contained electronics eliminate the need for external power
module
• Rugged all-metal case with a two-layer steel mesh grille
• Isolators provide mechanical dampening of mounting-surface
vibration
• Available in two colors: black (ES947) and white (ES947W)
Description
The ES947 is a wide-range condenser microphone with a cardioid polar
pattern. It is designed for unobtrusive table, ceiling or panel-mounted
use in high-quality sound reinforcement, conferencing, professional
recording, television and other demanding sound pickup applications.
The microphone requires 11V to 52V phantom power for operation.
The microphone is equipped with UniGuard
which offers outstanding rejection of radio frequency interference (RFI).
The output of the microphone is a 3-pin XLRM-type connector.
The microphone's cardioid polar pattern provides a 120° angle of
acceptance (cardioid in hemisphere above mounting surface).
Isolators are included with the microphone for optional mechanical
isolation from the mounting surface. The microphone is enclosed in
a heavy-duty die-cast case and protected by a two-layer steel mesh
grille. The low-profile housing has a low-reflectance black finish. The
microphone is also available in white as the ES947W.
Installation and Operation
The ES947 requires 11V to 52V phantom power for operation.
Output 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.
The microphone should be installed on a flat, unobstructed mounting
surface. The small-diameter capsule near the boundary eliminates phase
distortion and delivers clear, high-output performance.
To mount the microphone in a ceiling or table top without the isolators, a
RFI-shielding technology,
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20.5 mm ( ⁄ ") diameter hole is required. To mount the microphone with
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the isolators, a 23.5 mm ( ⁄ ") hole is required. Place the isolators on
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either side of the hole to achieve mechanical isolation from the mounting
surface.
Avoid leaving the microphone in the open sun or in areas where
temperatures exceed 110° F (43° C) for long periods of time. Extremely
high humidity should also be avoided.
Architect's and Engineer's Specifications
The microphone shall be a fixed-charge condenser designed for use
in table, ceiling or panel-mount boundary applications. It shall have a
cardioid polar pattern with a uniform 120° angle of acceptance (cardioid
in hemisphere above mounting surface) and a frequency response of 40
Hz to 12,000 Hz. The microphone shall operate from an external 11V to
52V DC phantom power source. It shall be capable of handling sound
input levels up to 142 dB with a dynamic range of 113 dB. Nominal open
circuit output voltage shall be 7 .9 mV at 1 V, 1 Pascal. Output shall be low
impedance balanced (200 ohms). It shall offer outstanding rejection of
radio frequency interference (RFI).
The microphone shall incorporate self-contained electronics, eliminating
the need for an external power module. The output of the microphone
shall be a 3-pin XLRM-type connector.
The microphone shall have a maximum diameter of 30.0 mm (1.18")
and an overall length of 69.0 mm (2.72"). Weight shall be 64 grams (2.3
oz). The microphone shall be housed in an all-metal case with a two-
layer steel mesh grille. Finish shall be low-reflectance black [white]. The
microphone shall include resilient isolators for reduction of mechanical
noise transfer from the mounting surface.
The Audio-Technica ES947 [ES947W] is specified.
engineered sound microphones
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