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Hearing Helper
™
Personal FM Receiver • Model PFM R31
Hearing Helper
™
Personal FM Receiver • Model PFM R31
©2007, Williams Sound Corp. MCAT
005B 2
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
Acoustic Specifications:
ANSI 2.44 Test
ANSI S3.22–1987 Test
Environmental Mic Response (PFM R31)
Input: 80 dB random noise
Device: KEMAR mannequin with BTK 3550 tester
Y: 80.0 dB 80 db Main Y: 50.2 dB
X: 100 Hz + 8 OCT LOG Main X: 4 kHz
FM Response (PFM R31)
Input: 80 dB random noise
Device: KEMAR mannequin with BTK 3550 tester
Y: 80.0 dB 80 db Main Y: 34.1 dB
X: 100 Hz + 8 OCT LOG Main X: 4 kHz
FM Response (PFM R31)
Minimum Low Cut (Tone Set to Low)
Max. SSPL90: 135.8 dB at 500 Hz
HF Avg. SSPL90: 127.1 dB
HF Avg. Full On Gain: 37.7 dB at 60 dB in
Reference Test Gain: 38.1 dB
Response Limit: 80.1 dB
F1=200 Hz, F2=8 kHz
Total Harmonic Dist: 3.6 % at 500 Hz
3.9 % at 800 Hz
2.2 % at 1600 Hz
Medium Low Cut (Tone Set to Mid)
Max. SSPL90: 135.5 dB at 600 Hz
HF Avg. SSPL90: 127.1 dB
HF Avg. Full On Gain: 36.8 dB at 60 dB in
Reference Test Gain: 37.3 dB
Response Limit: 79.4 dB
F1=200 Hz, F2=8 kHz
Total Harmonic Dist: 3.4 % at 500 Hz
3.4 % at 800 Hz
2.2 % at 1600 Hz
Maximum Low Cut (Tone Set to Hi)
Max. SSPL90: 133.5 dB at 1000 Hz
HF Avg. SSPL90: 127.0 dB
HF Avg. Full On Gain: 35.4 dB at 60 dB in
Reference Test Gain: 35.8 dB
Response Limit: 78.01 dB
F1=200 Hz, F2=8 kHz
Total Harmonic Dist: 1.1 % at 500 Hz
2.7 % at 800 Hz
2.1 % at 1600 Hz
Environmental Mic Response (PFM R31)
No Tone Modification
Max. SSPL90: 134.8 dB at 500 Hz
HF Avg. SSPL90: 126.4 dB
HF Avg. Full On Gain: 40.9 dB at 60 dB in
Reference Test Gain: 40.8 dB
Response Limit: 81.1 dB
F1=200 Hz, F2=8 kHz
Total Harmonic Dist: 1.1 % at 500 Hz
1.1 % at 800 Hz
0.3 % at 1600 Hz