Is a quiet voice or a loud voice perceived as a good voice by listeners? I ran an experiment which analyzed 10 people. Each listened to one song twice and then answered which one had better sound, as well as which was more enjoyable. The song used for this experiment was, “Feel This Moment,” by Pit Bull.
This song is really suitable as a reference, because it has a wide range and so many kinds of rhythmic patterns.
I asked all my test participants which song version, the first or second, had better sound. This was asked after everybody listened the same song twice, and all 10 test subjects answered that the second one was better.
Honestly, the only different between the first and the second song is that the second song version is louder. The second song was increased in volume, 5% more than the first song.
Even if you use the same music and the same music player, you can just hear the instruments and vocals of the music better at a higher volume. Also according to the test subjects it is more enjoyable with a louder volume, instead of soft and quiet volume.
This is the same concept as with vocalization. If you let out a slightly louder voice than usual, your voice sounds better. I would like you to you try this with daily conversation or singing.
Note1:I changed the volume by %, using MA6700 (Mcintosh) but not dB.