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577B Microphone |
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Product Code:
577B Microphone
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The Shure Model 577B Microphone
is a handheld dynamic microphone designed for communications and
paging applications that require highly intelligible, low noise
output. It can be used in all types of mobile communications, from
amateur radio to helicopter news and traffic reports. It is also
suitable for public address and paging systems in noisy areas such
as factories, airport terminals, and restaurants.
The 577B represents a significant improvement over most microphones
with anti-noise features. Shaped frequency response,
directionality, and distant sound discrimination contribute to
total noise reduction. The microphone operates on the
pressure-gradient principle and has two sound entry ports spaced a
small distance apart.
A mounting bracket is supplied to provide convenient hang-up when
the microphone is not in use.
- 577B
with built-in hangup bracket and mounting
bracket
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| Features |
- Frequency response tailored for
close-talk operation
- Extremely effective noise
cancellation
- Dynamic microphone
cartridge
- Modular design
- "Million-cycle" leaf-type
press-to-talk switch
- TRIPLE-FLEXc able provides three
to four times the flex life of most coiled cords
- Rugged ARMO-DUR
case
- Built-in hang-up button and
supplied mounting bracket
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| Specifications |
- Type : Dynamic,
noise-canceling
- Frequency Response : 100 to 5,000
Hz
- Impedance (at 1000 Hz)
Rated at 150 ohms (175 ohms actual) for connection to microphone
inputs rated at 19 to 300 ohms.
- Output Level (at 1,000 Hz, 5/16
in.)
Open Circuit Voltage ... -66.0 dBV/Pa (0.5 mV)
0 dB = 1 volt per 1 Pascal/94 dB SPL
- Hum Sensitivity : Equivalent to 32
dB SPL in 1 millioersted field
- Operating Temperature Range : -40
degrees to 74 degrees C (-40 degrees to 165 degrees F)
- Switch Type : Double-pole,
single-throw, leaf-type, push-to-talk
- Cable : Non-detachable. 1.8m (6
ft), neoprene-jacketed coil cord, four-conductor (two conductors
shielded).
- Case : Two-tone gray, high-impact
ARMO-DUR®
- Dimensions : See User
Guide
- Net Weight : 330 grams (11.6
oz)
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