RTI Tech
MODEL 1142 PERFORMANCE SPECIFICATION

New condenser microphone for hearing aids with moderate suppression of low frequencies and emphasis of highs. (ski-slope)

 

Noise level (ŤAť-weighted)
(1 kHz equivalent SPL)

 33 dB Max
Supply voltage 1.3 V (.9–20 V)
Sensitivity change
at .9 V		 3 dB Max
Current drain at 1.3 V 40 ľA Max
Output impedance 3 kOhm (2–5 kOhm)

 

Sensitivity (dBV)
Frequency min nom max
gray.GIF (799 bytes)
300 Hz -75
1000 Hz -66 - 63 -60
~5000 Hz - 50
gray.GIF (799 bytes)

Device conformity range of deviation from 1 kHz
gray.GIF (799 bytes)
300 Hz -13.5 dB

to

 -10.5 dB
1000 Hz 0 dB 0 dB
~5000 Hz +8.0 dB

to

 +18.0 dB
gray.GIF (799 bytes)
Patents pending
981107-1142-a.tif (62878 bytes)

DIMENSIONS IN INCHES (MM)

 

 

981107-1142-b.tif (373350 bytes)

   RTI Tech Pte Ltd
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Singapore 139944
Tel: 65-776-1021
Fax: 65-779-1021
Contact: Hedy Teo, hedyteo@pacific.net.sg