丹姆德

FHDDMT78A


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FHDDMT78A

零件应在一个条件下(温度:5~35℃,湿度:45%~85%R.H.,大气压:860~1060hPa)进行测量,除非调节标准条件(温度:25±3℃,湿度为60±10%R.H.大气压:860~1060hPa)来进行测量。


所属分类: 多媒体喇叭
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关键词:蜂鸣器 | 喇叭| 物化片

产品描述

1.SPECIFICATION
Speaker

1

Dimension

Φ77*H30mm

 

2

Impedance

8Ohm ± 20% at 1KHz

 

3

Rated Input Power

2.0W

 

4

Max Input Power

3.0W

 

5

Lowest Resonance Frequency

250±20%Hz @ 1V. (Without Baffler)

 

6

Audible Noise

The input power shall be set at rated noise power(2.0W). Using an audio oscillator sweep from F0 to 20KHZ in free air. There shall be no buzzes,rattles,nor spurious noises.

 

7

Sound Pressure Level

113±3dB SPL(0.1m,1.0W)   at1.0,1.2,1.5,2.0KHz  (0dB SPL=20μPa)

 

8

Distortion

Less exceed≤10%  at  1.0KHz

 

9

Operating Temperature

-20℃ to + 50℃

 

10

Store Temperature

-30℃ to + 60℃

 

 

2.Dimensions

 

3.Reliability Test 可靠性測試

 

3.1

High  Temperature  Test

High  Temperature:   +60℃±5℃
Duration :            48 hours

3.2

Low Temperature  Test

Low  Temperature:    -30℃±5℃
Duration :             48 hours

3.3

Humidity  Test

Temperature:          +40℃±5℃
Relative  humidity:     90%~95% RH
Duration :              48 hours

3.4

Vibration  Test

Vibration:            10Hz~55Hz   
Amplitude:          1.52mm or acceleration : 50m/s2
Duration :            2h per axis=10 cycles ; 3 axis

3.5

Temperature  Cycle  Test

Temperature:         -30℃       +60℃
Duration :            1 hours    1 hours
Cycle:               5 Cycle

3.6

Drop  Test
(under the unit)

Height:              1.0m
Cycle:               5 Cycles

3.7

Load  Test

Noise:               White noise
Power:              2.0W
Duration:            48 hours and satisfy the test listed on item 05,08,14.

The test shall be carried out on the parts that passed 12hours in temperature 20℃.
The sensitivity difference from the initial value shall be within ±3dB.

 

4.Electrical And Acoustical Measuring Condition

5.Frequency Response 

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