Williams Sound PKT D1 manual Acoustic Specifications, Typical values ANSI S3.22-1987

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

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