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

Discussion in 'General Electronics Chat' started by Redwan, Feb 22, 2016.

  1. Redwan

    Thread Starter New Member

    Dec 21, 2015
    7
    0
    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!
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,144
    1,791
    I wasn't aware that you could measure SNR and THD for a speaker. What would that mean exactly?

    What does "lasting smoothly after manufacturing" mean?

    We have a serious terminology disconnect here.
     
  3. crutschow

    Expert

    Mar 14, 2008
    13,016
    3,235
    I want's aware that speakers had an operation lifetime, (at least not one that's less than the life of the rest of the device).

    I don't see any reason to try to measure SNR, since speakers don't have any intrinsic noise (unless you are talking about thermal noise in the speaker voice coil resistance but that would be unmeasurable in the audio output).

    You can measure the THD with an low distortion sine-wave source and amplifier, a low distortion, high-fidelity microphone, along with a distortion analyzer (or spectrum or FFT analzer).
    It's a standard high-fidelity speaker measurement.
     
  4. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,800
    1,104
    As for 'lifetime', would that be with the speaker operated continuously at its maximum rated power, or under 'typical' use conditions?
     
  5. AnalogKid

    Distinguished Member

    Aug 1, 2013
    4,540
    1,251
    Start by getting the manufacturer's test data from your components group, or whoever selected the speaker in the first place.

    ak
     
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