Internal Speakers

[Neelix]

Hey all,

Does anyone happen to know the frequency response range of the pandora's internal speakers?

While playing Galactic Artifact I noticed that one of the game sounds (a low 'bong' used to indicate an artifact has been detected on radar) isn't audible unless I have my external speakers connected.

This got me wondering exactly what the range of the internal speakers is, and whether some of the sound issues people have reported over the years have simply been due to the fact that the internal speakers are incapable of reproducing the sounds in question...

- Neelix

 

[klapse]

You can't squeeze bass out of tiny speakers. The pandora has almost no audible output below 100hz and that's normal.


You can measure frequency response using a microphone and recorder. Download and play a sine wave sweep tone on the pandora. Record the output of the pandora speakers with your microphone. Then you can measure the signal level at various points on the sweep. If the amplitude of the recorded signal at 50hz is 10 times smaller than the maximum amplitude recorded, you can say "frequency response is down 20db at 50hz"


http://en.m.wikipedia.org/wiki/Decibel


http://www.electronics-related.com/usenet/design/show/131301-1.php


My explanation is really incomplete, and this is only a rough measure since it does not correct for the microphone response curve.

 

[lomaxx]

hm...

Should be doable with

http://repo.openpandora.org/?page=detail&app=audacity

You should be able to generate a tone of a certain frequency with that.

 

[Yoyobuae]

Or just download these:

http://www.dr-lex.be/software/testsounds.html

I got that link from someone else on the forums, but don't remember which thread it was.