GSMArena feature labs: The tests

The tests

GSMArena team, 26 April 2012.

Update Mar 4, 2020: This review test has been discontinued. You can find the full explanation of the test below but it's no longer carried out on new devices. Our new and improved Speaker test supercedes it.

Speakerphone loudness test

A loudspeaker that is nice and... well, loud, is a nice asset for your mobile. Whether it's hearing the other person on the speakerphone or your phone ringing from the other room, or even playing music on your get-together's, a loudspeaker is definitely something that's nice to have.

And while the quality of the loudspeaker sound is difficult to measure and is, for the most part, a subjective matter, we can effectively measure how loud it is.

For this, we use a digital noise/loudness meter which measures the peak loudness of the phones and tablets we review, in decibels (dB).

We do our tests in a soundproof studio taking measurements with the handset loudspeaker facing the loudness meter at a distance of exactly 1 m. For each test we make several consecutive measurements - we usually disregard the highest readings and take the lowest of the maximum values, as that's least likely to have been misread. We test three different types of audio samples for three different scenarios:

1) A phone ringing. For the first part of the test we use a ringtone which resembles the ringing of an old rotary phone, because it seems that most phones do well when we use it.

2) Pink noise. Next we try a sample of pink noise. Our readings with it are pretty indicative on how well the handset loudspeaker can play most music.

3) Human voice, male. This is an important test, since if you tend the use the loudspeaker for speakerphone purposes, loudness is really important, regardless of whether you are in the conference room or in your car.

Once we have the results in db for all three sound samples, we sum them up and use a in-house developed formula to produce a qualitative description of the loudness levels: Below Average, Average, Good, Very Good and Excellent.

As many of our results are separated by a difference of only a few decibels, it is important to keep in mind that the decibel is a logarithmic unit, which means that a reading of +3dB represents roughly two times the power.

We'd like to reiterate again that this test is not about the quality of the sound produced by the loudspeaker. A mild, relatively deep-sounding loudspeaker that soothes the ear won't do well in this test. Instead, what we are after is pure peak loudness - it's our hunt for the loudest phone, ever.

Reader comments

yes, please reintroduce the audio lab test data. the music sample test is very nice, but it would be complimented by the raw audio data results, which was always premium section in very review.

  • yogesh

please don't discontinue lab audio test my previous phone was asus max which shows 93db snr in your lab test my present phone asus 6z snr only 85db i feel the difference in sound clarity if you discontinue audio lab test i cant find a...

  • Anonymous

Some older reviews have two scores for the endurance rating with and with AOD e.g. Samsung Galaxy A3 2017 and Samsung Galacy A7 2017. Are all the newer endurance rating scores with AOD disabled?