CTG Audio CM-02 Electret Condenser Ceiling Microphone

The CM-01 and CM-02 ceiling microphones utilize a special pressure sensitive, tensionless low-mass element enhanced with an integrated FET low noise amplifier. These characteristics result in ultra smooth frequency response providing excellent feedback stability for voice reinforcement and teleconferencing applications. The high temperature stability assures exceptional system performance in fixed gain situations. In an average acoustical environment this microphone will have a pickup range of 10 - 12 radius.

Key Features

• Group teleconferencing for: Boardrooms, classrooms/training rooms, and focus groups/observation rooms
• Ideal for rooms with perimeter seating (no need to walk up to table to be heard)
• Allows furniture to be rearranged with no compromise to the audio system
• Provides even pick up for the maximum number of participants with the minimum number of microphones
• Provides clean clutter free environment no visible cables
• Virtually invisible flush mounted in the ceiling, visible portion smaller than a dime
• Minimizes unwanted table noise such as paper shuffling, pen clicking and laptop key strokes
• Participants can turn their backs to the table, walk around and still be heard evenly

Technical Specifications

Element
Electret Condenser
Frequency Range
10-20,000 Hz
Phantom Voltage
2-50 Volts DC
Acoustical Mode
Boundary Effect Pressure Transducer
Temperature Stability
+/- 0.02 dB per degree F maximum
Operating Current
50 µA maximum
Impedance
200 Ohms nominal, balanced
Output Level ref 1mW/10dynes/cm2
-57 dBm (-51 dBm when mounted)
Equivalent Noise level A weighted
28 dB SPL (-22 dB SPL when mounted)
Equivalent Vibration Sensitivity
70db (1 KHz SPL equivalent of 1G)
Recommended Room Conditions
Reverberation Time: < 0.6 seconds Noise Level: < 48dBa

Manual