24
ACOUSTIC SPECIFICATIONS
Typical values (ANSI S3.22-1987)
Lightweight headphone, HED 021: (with 6cc coupler)
Test Tone High Tone Mid Tone Low
SSPL90 121.4 dB 120.6 dB 120.1 dB
HF Avg (SSPL90) 119.3 dB 118.9 dB 118.4 dB
HF Avg full on gain (50 dB) 39.3 dB 36.5 dB 32.3 dB
Reftest gain 39.5 dB 36.7 dB 32.3 dB
Wide range headphone, HED 026: (with 6cc coupler)
Test Tone High Tone Mid Tone Low
SSPL90 121.8 dB 122.0 dB 122.5 dB
HF Avg (SSPL90) 120.9 dB 120.5 dB 119.3 dB
HF Avg full on gain (50 dB) 41.9 dB 38.9 dB 33.9 dB
Reftest gain 42.2 dB 39.1 dB 34.0 dB
Wide range earphone, EAR 008: (with 6cc coupler)
Test Tone High Tone Mid Tone Low
SSPL90 120.9 dB 120.7 dB 120.9 dB
HF Avg (SSPL90) 116.7 dB 116.5 dB 116.2 dB
HF Avg full on gain (50 dB) 37.3 dB 34.8 dB 30.8 dB
Reftest gain 37.6 dB 35.0 dB 30.9 dB
Mini earphone single, EAR 013: (with 2cc coupler)
Test Tone High Tone Mid Tone Low
SSPL90 123.5 dB 123.5 dB 123.5 dB
HF Avg (SSPL90) 117.8 dB 117.7 dB 117.5 dB
HF Avg full on gain (50 dB) 38.6 dB 36.5 dB 32.7 dB
Reftest gain 39.4 dB 37.1 dB 33.1 dB
Dual Mini Earphone, EAR 014: (with 2cc coupler)
Test Tone High Tone Mid Tone Low
SSPL90 120.8 dB 120.9 dB 121.1 dB
HF Avg (SSPL90) 109.1 dB 109.0 dB 108.9 dB
HF Avg full on gain (50 dB) 30.3 dB 28.4 dB 25.3 dB
Reftest gain 31.0 dB 28.7 dB 24.8 dB
