国产无套露脸视频在线观看_一区二区 福利_小市民系列动漫免费观看_97色在线播放视频_91原创视频在线观看_日韩不卡一二区

Model

UGG-40040CW-1

1

Type

Dynamic    Speaker

2

Dimension

Outline Dimension Shall Be As Shown In    Fig(1).

3

Weight

Approx  9.4   Grams.

4

Magnet 

Material       

Nd-Fe-B

5

Impedance 

40

±    15%  Ohm   

6

Power    Rating 

 Normal

20mW

Maximum

30mW

7

 S.P.L.

121±3dB/1mWatt    0.01Meter. At1000Hz.

Measurement Method    Shown In Fig(2).

8

Frequency    Range

20~20,000Hz.Average    SPL-10dB. Frequency    Response Fig(3).

9

Distortion

5%    Maximum  At1000Hz. 1mW

10

Abnormal    Sound Test

Must be    Normal Tested by

0.89

 Volts.Sine wave for20-2kHz

11

Polarity

Diaphragm    Shall Move Forward When Apply a Positive DC.

Red“+”or“Marked”    Terminal

12

OperatingTemperature

-20°C to +50°C

13

Storage    Temperature

-25°C to +55°C

14

Reliable Test

After any    following test leave speakers at room temperature for 1 hour, SPL shall not    deviate by ± 3 db from    initial value

14-1

Load Test

white noise for 96 hours  at     20mW input power.

14-2

High Temperature Test

+55±2 °C     96hours

14-3

Low Temperature     Test

 -20±2 °C96hours

14-4

Humidity Test

+40±2 °C    relative humidity 90~95%R.H 96hours

14-5

Vibration Test

Frequency 30 ± 15 Hz,    Amplitude 1.5 mm for 2 Hours per axis(x. y. z axis)

14-6

Temperature Cycle test

75 CM free falling on Concrete floor,    10 times.

14-7

Temperature Cycle test

-25°C ~ + 65°C   5 Cycles Temperature test.