华商宝

1.   Scope
     This document contains required environmental, electrical, acoustic, mechanical, package
and reliability test requirements.
2.   Environmental Requirement
    The transducer including all components and solder joints must be free from lead (Pb) and
 other banned or restricted substances according to customer's requirements.
3.   Electrical Requirments
3.1  Rated Impedance 8±15% ohms @2kHz, 1Vrms input
3.2 Rated Noise Power (in 1cc box) 0.5 Watts
  3.3 Short Term Maximum Power (in 1cc box) 0.7 Watts
 
4.   Acoustical Requirments
  4.1 Sound Pressure Level 85 +/-3dB @1v/10cm at flat range 
  4.2  Bass Resonance Frequency  in free air 600±20%Hz, 1v input
4.3  Rated Frequency Range 200 - 10kHz
        Frequency Response   See Figure 1
4.4 THD <10%  @ 1KHz,  1v input
       
4.5  Rub & Buzz
       The input power shall be set at rated noise power with specified back cavity. Using an 
audio oscillator  sweep from 200 to 3000Hz . There shall be no buzzes,rattles, nor spurious
 noises.
5.   Polarity Requirments
5.1 Polarity
       When a DC source′s "+" polarity is attached to the "Signal"— marked in "+"and the
 "-" polarity is attached the "GND",the membrane will move forward.
5.2  Magnetic Polarity  Top of the magnet is the north pole.