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1-1 SCOPE
This specification is a typical speaker unit for telephone hand set
1-2 DIMENSIONS
As shown in fig (1)
1-3 NET WEIGHT
APPROX. 1.2 grams
1-4 OPERATING
TEMPERATURE
-30℃ to +70℃
1-5 STORAGE
TEMPERATURE
-40℃ to +85℃
2.ELECTR0ACOUSTIC CHARACTERISTICS
2-1 TEST SET UP
Measuring conditions and procedures shown in fig(2)
2-2 IMPEDANCE
8Ω±15% ohm ( at 2 KHz, 0.9Vrms )
2-3 SOUND PRESSURE
LEVEL
93dB ±3dB SPL /0.8W/10mm at 500、800、1000、1200Hz .AVE
2-4 FREQUENCY
RESPONSE
1000±20%HZ
2-5 INPUT POWER
(NOM./MAX.)
0.8W/1.0W
2-6 AUDIBLE NOISE
Must be free audible noise (buzzes and rattles)
(200 ~ 10KHz frequency range ,input level up to 2.53Vrms)
2-7 DISTORTION
Less than 10% at 1KHz 0.8W
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