How to measure audio quality in portable media players

2/16/2009 5:26 PM EST

• The basic equipment and source material needed to properly measure portable media players

• How to correctly define the test set up and load conditions

• Some basics of audio tests

• How to figure out what power levels to target in order to measure the player's full potential

• Which data you should take and how you can compare it between devices on a level playing field

The first video (9:38) begins with an introduction to the basic equipment and source material needed to properly measure players, as well as an explanation of several standard audio measurement specifications:

The second video (10:25) includes a discussion of measuring THD+N vs. Power and measuring THD+N changes over different volume settings:

The final video (8:22) shows how to calculate the dynamic range of a player from its THD+N vs. Power plot, and how to run a frequency response sweep:

Comments, questions or suggestions? Email me at rich.pell@verizon.net.