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
