01

type

dynamic receiver

02

dimension

11*1mm

03

impedance

32ohm±15% at 1khz

04

sensitivity (s.p.l.)

110 db±3 db at 1khz 179mv with iec 318 coupler

05

frequencyrange

refer to frequency response chart.

06

magnet field intensity.

axial– db , radial –db at 1khz

07

1.0g± 0.1g

08

should not exist any obstacle to be harmful to normal operation; damages, cracks, rusts and distortions, etc.

09

buzz, rattle, etc.

should not be audible at 0.25v sine wave between 300 hz to 3.4 khz.

10

load test.

0.25v white noise (eia filter) is applied for 96 hours

11

environmental test.

sensitivity difference shall be within±3 db and should satisfy the listed on item 04, 05, 08 and 09, after each following test.

12

high temperature test

85℃for  96 hours

13

low temperature test

-40℃for  96 hours

14

damp heat

60℃, 95%rh for 96 hours

15

temperature cycles

-40℃(2h)~70℃(2h)-10 cycles

16

drop test

normalafter droping to concrete floor for 1 m height for 10 times with packing

17

using temperature

-20~70℃