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AudioAcoustics

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Sep 13, 2005

People have started to realize that MP3 players can cause hearing loss. This is one of those that’s obvious to me but, then again, I do this stuff for a living.

The problem is that there’s no real solution to the problem (other than turning down the volume). Portable audio players have to be able to drive a wide variety of headphones, so that even low-sensitivity headphones can output acceptable sound levels. That, of course, means that high-sensitivity headphones will get loud.

Just use some common sense – keep the volume at a reasonable level (if your ears are ringing, or you can’t understand speech from someone speaking with a raised voice, it’s probably too loud) or try to limit the amount of time you listen to music at high volumes. Once you lose your hearing, you never get it back.


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The CEDIA 2005 Expo concluded this past weekend. I was planning to go, but I got roped into was invited to present a paper at Noise-Con 2005, and I only have budget for one out-of-state tradeshow this year (although I may sneak down to AES in NYC next month).

[BTW, searchable database of papers to be presented at the 2005 Noise-Con/ASA meeting can be found here.]

Anyhow, one CEDIA announcement caught my eye: Dolby Introduces Dolby TrueHD, Lossless Audio for High Definition Discs“With Dolby TrueHD, home theater viewers will experience audio performance equal to the highest-resolution studio masters currently available.”

HD combined with a losslessly compressed audio? Yum.

[from Peter Cook]


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A non-CEDIA announcement that caught my eye: a DIY DVD burner and harddrive recording unit. Just add your own harddrive.

[from Gizmodo]


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A couple of MIT tidbits:


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