(Discontinued) Close-Talk Voice Communication Microphone
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By: Shure
Microphones, Headphones & Wireless systems
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This product has been discontinued. For an alternative, please contact [email protected]
The Shure Specialty to General Communications Microphone Series 577B SONOBAR 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 577-B 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. The modular design of the 577B greatly facilitates field servicing. The cartridge, switch, and cable can be replaced in a matter of minutes, if necessary.
The 577 B is built to withstand mechanical shocks, vibration, high temperatures, and humidity. The exclusive ARMO-DUR case is impervious to oil, grease, fumes, salt spray, sun, and corrosion. The Million-Cycle press-to-talk switch ensures years of reliable service. A mounting bracket is supplied to provide convenient hang-up when the microphone is not in use
→ 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-FLEX cable 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
Type |
Dynamic, noise-canceling |
Frequency Response |
100 to 5,000 Hz |
Impedance (at 1000 Hz) |
Rated at 150 O (175 O actual) for connection to microphone inputs rated at 19 to 300 O |
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° to 74° C (-40° to 165° F) |
Switch Type |
Double-pole, single-throw, leaf-type, push-to-talk |
Cable |
Non-detachable. 1.8 m (6 ft), neoprene-jacketed coil cord, four-conductor (two conductors shielded) |
Case |
Two-tone gray, high-impact ARMO-DUR |
Net Weight |
330 grams (11.6 oz) |
Certification |
Eligible to bear CE Marking. Conforms to European EMC Directive 89/336/EEC. Meets applicable tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residential (E1) and light industrial (E2) environments |
© 1996 - 2024 | All Rights Reserved
Audio Video Supply Inc.
4542 Ruffner St. Suite 220
San Diego, CA 92111
Prices and specifications subject to change without notice.