Samsung Blackjack II Cell Phone Review - Audio Quality
To test audio quality we use the same professional grade software and equipment that many cell phone manufacturers and carriers use. To simulate the human ear we use a Head and Torso Simulator (HATS) from Brüel & Kjær. To analyze the audio captured we use Listen Inc's
SoundCheck software. For more information on how we test see
this article.
Sound Receive Frequency Response (7.49)
The chart above indicates the quality of sound received by the Blackjack II. The blue line is the phone's performance while the two red lines are the limits against which we test. You can see that the Blackjack II had a couple of problems, rising slightly above our limits at lower frequencies and dropping off a little too quickly at the upper frequencies. Neither of these is a major problem, but you may notice that some lower voices are exaggerated while some higher voices are clipped. You can see below that minor as these problems are they are significant enough that the Blackjack II put up the second worse score amongst our comparison phones.
Sound Send Frequency Response (8.42)
In this test we look at the quality of sound sent by the Blackjack II, so this is how you will sound to those on the other end of the call. As before the graph above indicates the Blackjack II's performance with a blue line while our limits are delineated in red. Unlike the sound received by the Blackjack II we saw very few problems with the sound sent by the phone. You can see from the graph that it stays within our limits across the range of frequencies, with the only possible issue that it may drop off a little too quickly at the end, but even here it stays within our testing limits. The result is that the Blackjack II put up a better score in this section than any of our comparison phones.
Handset Side Tone (7.02)
Side tone is the small amount of your own voice that you hear through the phone's speaker so you can judge how loudly you are speaking. We like to see side tone around -18 decibels, while the Blackjack II scored -20.98 decibels. This is a little on the low side and you may find yourself speaking more loudly than you should to compensate. That being said we've seen worse, you can see below that the Nokia N81 put up a similarly low side tone score while the iPhone's side tone is very high.
