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
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