Listen Technologies CMR3 Data Sheet
CMR3
Hearing Loop Calibrated Measuring Receiver
Configuration:
CMR3 Hearing Loop Calibrated Measuring
Receiver
Product Overview:
The CMR3 calibrated receiver is designed for measuring the performance of audio hearing loop systems. The audio output is
within ±0.25 dB over the frequency range and where used with a suitable audio analyzer such as the Minilyser from Neutrik
Ltd, the frequency response and field distribution of the magnetic field from any audio hearing loop system can be plotted.
Calibrated to provide 0 dBu output for a field strength of 400 mA/m RMS, in accordance with the international hearing loop
standard IEC60118:4. It is an essential tool for anyone wishing to assess loop system performance for analyses or
certification.
Highlights:
Calibrated receiver designed for measuring the performance of audio hearing loop systems to the international
hearing loop standard IEC60118:4.
Accuracy with ± 0.25 dBu and compatible with most analyzers.
Five year warranty back by Listen’s service and support.
Includes:
One (1) CMR3 Hearing Loop Calibrated Receiver
Product Specification: Hearing Loop Calibrated Measuring Receiver
Audio
Frequency Response 50 Hz to 8 kHz: ± 0.25 dB, 30 Hz and 14 kHz: -3 dB, A-Weighted Filter:
EN61672-1:2003 Sound Level Meter (Switched)
Gain Stability Output variation over battery life: < 0.1 dB, Ouput variation due to loading: <
0.1 dB, Output variation over temperature range: < 0.25 dB, Over gain
variation: < 0.5 dB
Indicators
Battery Status OK when LED Illuminated
Interconnections
Headphone Connector 3.5 mm Stereo Balanced, > 600 Ohm
Loop
Coil Orientation Coil orientation vertical as indicated on unit
Reference Level 400 mA/m RMS - 0 dBu Audio Output (0.775 V)
Power
Battery Type Two (2) AA Alkaline
Battery Life Approximately 200 hrs.
Physical
Listen Technologies Corporation * 14912 Heritage Crest Way * Bluffdale * Utah 84065-4818 U.S.A.
Hearing Loop Calibrated Measuring Receiver Page 1 of 2
+1.801.233.8992 * +1.800.330.0891 North America * +1.801.233.8995 Fax
Listen Technologies Corporation All rights reserved 91407 - Created December 12, 2019
CMR3
Hearing Loop Calibrated Measuring Receiver
Product Specification: Hearing Loop Calibrated Measuring Receiver
Width 2.4 in. (62 mm)
Height 4.4 in. (112 mm)
Depth 1.0 in. (26 mm)
Shipping Weight 1.0 lbs. (454 g)
Weight 2.88 oz. (82 g)
Environment IP20 Protection, 20 to 90% Relative Humidity, 14 F (-10 C) to 113 F (45 C)
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Listen Technologies Corporation * 14912 Heritage Crest Way * Bluffdale * Utah 84065-4818 U.S.A.
Hearing Loop Calibrated Measuring Receiver Page 2 of 2
+1.801.233.8992 * +1.800.330.0891 North America * +1.801.233.8995 Fax
Listen Technologies Corporation All rights reserved 91407 - Created December 12, 2019
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