This is a pure announcement microphone, with the same functions excluding the telephone hands-free function
Supplied ready for installation on the left-hand side of the driver’s seat, rearrangement of two coding elements also enables the microphones to be used for right-hand drive vehicles.
In addition, the microphone can also be easily swivelled 90 degrees upwards or 30 degrees to either side, thus providing optimum adjustment to the driver’s individual body size and arm reach.
The microphones can be used with a BOSCH Coach Audio bus system to enable the driver to make announcements (separate on/off switch must be installed)
Length – 500mm
Diameter – 6mm
Technical data
CDM09/CDM09 GSM
Transducer principle: Dynamic
Acoustic mode of operation: Pressure-gradient receiver
Directivity characteristic curve: Supercardioid
Frequency response: 100 Hz – 12000 Hz (close-talking)
Free-field open-circuit sensitivity at 1 kHz: 1 mV/Pa
Nominal impedance: 240 Ω
Nominal load impedance: ≥ 1 kΩ
Threshold sound pressure level at 1 kHz: ≥ 140 dB SPL
Feedback attenuation: ≥ 15 dB at 135°
