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Turn your Nokia N82 into mobile voice quality testing device

Sevana Oy

2/7/2010 10:09:00 AM


Great news about use of AQuA software - now you can easily test voice
quality in your or any other mobile network just by using your Nokia
N82 mobile phone and Sevana AQuA software. Here is how you can do it.

First of all do you know that you can record phone calls you make
with your Nokia N82 phone? During a phone call just hit Menu on your
keypad, select Applications > Media > Recorder. Select Options >
Record Sound Clip to record your current phone call. Now you have an
audio file for the so called non-intrusive voice quality testing.
However, AQuA is the means to do intrusive voice quality testing and
therefore we need a reference audio file. There are a couple of simple
ways to test voice quality in your mobile network:

1. If your operator allows uploading a greeting audio file into your
voice mailbox then you just need another phone or SIM card:

Step 1: Upload a reference audio (you can also use the speech model
audio file provided with AQuA for most accurate voice quality testing
or just any audio) to your mobile operator facilities as your voice
mailbox greeting message (that will be the reference audio) and set
your connection to forward all calls to your voice mail when your
phone is unreachable or turned off. Now switch your phone off - you
have just created an answering machine to test voice quality of your
mobile network!

Step 2: Use another SIM card of the same or other mobile network
(depending whether you like to test voice quality in your mobile
network or the quality of a voice call from one mobile network to
another), insert it in your phone and dial the phone number of the SIM
card you used to store audio to your voice mailbox.

Step 3: Your call will be forwarded to your voice mailbox and you will
hear the greeting message you uploaded. Record the call as described
above, transfer the audio file to your computer and use AQuA to test
the original file quality against the recorded one and you will
receive objective estimation in percentage of quality, Mean Opinion
Score (MOS) and PESQ-like values.

2. You can use an ordinary answering machine (the best digital, so you
can upload digital recording into it) in the same manner and plug it
into a phone socket of a fixed line. This way you will test voice
quality between your mobile operator and fixed line (PSTN) provider.

3. You can use a mobile modem with voice feature enabled (to create a
mobile answering machine) and make phone calls from your N82 to it
thus testing voice quality between two mobile devices.

Do you have a virtual number and like to test voice quaity between
your moblie network and virtual number provider? just set it to
forward calls to voice mail and make sure that the greeting message is
the same as your reference audio.

Special issue of this post:

- you don’t have to buy AQuA for doing these tests, just contact us
and we’ll do testing ourselves providing you with CSV or XML file with
the test results

Good luck with your tests!
Original at: http://wordpress.sevana.fi/turn-your-nokia-n82-into-a-voice-quality-testi...