Wednesday, February 11, 2009

What does 30 dB sound like?

It ocurred to me that it might not be perfectly clear, exactly what 30 dB sounds like. In fact, a year ago, I wouldn't have had a great idea what 30 dB sounded like either. Check out the speech banana:


Normal breathing is at 10 dB. Leaves rustling in leaves is 20 dB. Whispering is at about 20 dB also. Spoken language occurs mostly between 40 and 60 dB. We haven't really gotten into what frequencies he hears more easily yet (although generally, it's the lower frequencies). But, in terms of loudness, Lucas can hear us speak!

3 comments:

Tanna's Triplets said...

I have seen that graph before.

What a joy it must be too see Lucas's progress!!

Bill and Shelly said...

Thanks for checking out our blog. Do you mind if I add your's to our list?
So glad Lucas is doing so well. Before you know it he will be talking your ears off( no pun intended) and you will be asking him to be quite for a few minutes, I never thought it would happen but it did, I actually asked Allison to stop talking for awhile.

susannah said...

that's great! Way to go lucas!

at our last booth test we found out at at 250 and 500 freq, monrovia can hear between 30 and 40 dB!

So exciting!