手机受话器

ITEMS. SPECIFICATIONS1TypeDynamic receiver unit2Dimension.External diameter 38 mm3Sensitivity (S.P.L)93 dB ±3 dB at 1kHz 60mV with IEC 318 coupler4Frequency Response.Refer to frequency response chart.5Impedance.150 Ohm ±20% at 1KHz6Magnet Field Intensity.Axial – dB , Radial –dB at 1KHz7Max. Input Power.Must be normal at a white noise , 50mW for 1 minute.8Weight.35g ±2g9Appearance.Should not exist any obstacle to be harmful to normal operation: damages, cracks, rusts, and distortions, etc.10Buzz, Rattle, Etc.Should not be audible at 1V sine wave between 300 Hz to 3.4 kHz.11Terminal Strength.Capable of withstanding 1 kg load for 15 sec without resulting in any damage or rejection.12Load Test.1mW white noise (-filter) is applied for 72 hours satisfy the tests listed on item 03,04,09, and10