志程ZC-1101手机喇叭
| 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 |
weight | 1.0g± 0.1g |
| 08 |
appearance | 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℃ |
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