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Man and woman talking
ALD Division
© GN ReSound ALD Division 2004
Conference: technical info
Last updated January 25, 2010
Technical data
Any issues relating to the EU Medical Device Directive 93/42/EEC should be directed to GN ReSound A/S.
CE-symbol
  1. Microphones.
  2. Batteries.
  3. Paper clip.
  4. Switch.
  5. Indicator lamp.
  6. Connection of neck loop.
  7. Connection of external microphone.
  8. Connection of external sound source (e.g. tape recorder).
  9. Built-in loop.
Conference technical drawing
Power supply: 4 pcs 1.5 V penlight batteries.
Battery life: Approx. 100 hours.
Field strength: +12 dB rel 100 mA/M at 0.7 mV (70 dB SPL) from the microphones at a distance of 45 cm from the loop.
Frequency range: 200 Hz – 8 kHz, -3 dB rel 1 kH.
Distortion: <3%.
Gain: 0.7 mV from the microphones at max gain produces
2.5 V out to the loop and 250 mV out at the tape recording. The tape contact can also be used for playback.
Output voltage: 2.2 V to the neck loop.
Current consumption: 25-200 mA.
Weight: Approx. 1.3 kg (including block).