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Dynamic Microphone Type

Dynamic Microphone Type

Simple, rugged diaphragm/coil. handles extreme volume levels without distortion.
OmniDirectional Polar Pattern

OmniDirectional Polar Pattern

Equally sensitive to sound from all directions, but cannot be "aimed" to isolate one area.
Tailored Frequency Response

Tailored Frequency Response

Smooth, extended response. Tuned to accentuate specific types of instruments or voices.

577B “Close-Talk” Microphone

Applications
Form Factors
Model Lines

Designed for communication systems — mobile and fixed station — including police, fire, utilities, transportation, commercial, and industrial applications. Suitable for environments with high levels of background noise.

Note: For proper operation, mouth-to-microphone distance should be 1 inch (2.5 cm) or less.

    • Frequency response designed for voice communications
    • Directional mic element
    • Minimal pick-up of background noise due to close-talk design
    • Rugged, high impact ARMO-DUR® case
    • Double-pole, single-throw PTT switch designed for constant usage
    • Four conductor, shielded, bare-ended (no connector) coil cord
    • Does not require DC power for operation
    • Mounting bracket included
  • Type
    Dynamic, noise-canceling
    Frequency Response
    100 to 5,000 Hz
    lmpedance
    Rated at 150 ohms (175 ohms actual) for connection to microphone inputs rated at 19 to 300 ohms.
    Output Level
    Open Circuit Voltage: -66.0 dBV/Pa* (0.5 mV) *0 dB = 1 volt per 1 Pascal/94 dB SPL
  • Name Availability
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    R98B

    Replacement Cartridge for 577B Microphone.

    		 Where To Buy
  • File Language Type File Size
    577B User Guide English PDF 827 kb
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