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How to test the SNR, THD and Lifetime of a Cell Phone Speaker?

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Hello Everyone!

I actually want to know the standard procedure of testing the SNR value, THD value and Lifetime of a Cell Phone Speaker. Like How long the speaker will last smoothly after manufacturing.

I also intend to know the standard value of SNR, THD and Lifetime measurement of a 8 ohm, 0.8 watt speaker of a cell phone aka mobile phone. I Appreciate any types of testing procedure for testing the speaker of a cell phone in Details. It is needed for a Cell Phone manufacturing company, Urgently.

Thanks in advance for your help!
 
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