Storm sounds

Jim Andrada · May 19th, 2015, 10:28 PM

I do indeed remember the sheet metal. When I took 7th grade shop class we thought it was great fun to play with some old sheet metal to make thunder. I was just afraid nobody would believe me!

Renton Maclachlan · May 20th, 2015, 03:35 AM

Thanks everyone...I have some things to try! I'm onto another episode in the series so will have to go back to it...

I have Rose's book 'Great Sound for Digital Video' but haven't looked at it in a long time. I got it and went through it all when I was 'learning'. Maybe I need to look at it again... :-)

Renton Maclachlan · May 20th, 2015, 03:42 AM

Hi Greg

Re your clipping sound example...hmmmm...I'm fully aware that after a life time of running power tools (many years without earmuffs!!!) I've lost some of my hearing...however...I can't hear any distortion, just increased volume. Maybe the distortion is in a frequency that I can no longer hear...

Greg Miller · May 20th, 2015, 06:22 AM

Don't you hear the additional upper harmonics created by the clipping?

Here's a spectral view. The single red spike is the 440Hz fundamental from the first tone sample (the one at -6dBFS). The green spikes are the harmonics added in by moderate clipping in the second tone sample. The blue spikes are the additional (and higher level) harmonics added by the heavier clipping in the third sample.

The distortion products start with the second harmonic, located at 880Hz. Surely you can hear that frequency, or you'd be unable to understand speech. The first really loud harmonic is the third harmonic at 1,320Hz. Again, you need that frequency to be able to understand speech.

If you still can't hear these when listening closely, maybe I can devise another example file.

May 19th, 2015, 10:28 PM	#16
Jim Andrada Inner Circle Join Date: Feb 2007 Location: Tucson AZ Posts: 2,211	Re: Storm sounds I do indeed remember the sheet metal. When I took 7th grade shop class we thought it was great fun to play with some old sheet metal to make thunder. I was just afraid nobody would believe me!

May 20th, 2015, 03:35 AM	#17
Renton Maclachlan Trustee Join Date: Jul 2007 Location: New Zealand Posts: 1,180	Re: Storm sounds Thanks everyone...I have some things to try! I'm onto another episode in the series so will have to go back to it... I have Rose's book 'Great Sound for Digital Video' but haven't looked at it in a long time. I got it and went through it all when I was 'learning'. Maybe I need to look at it again... :-)

May 20th, 2015, 03:42 AM	#18
Renton Maclachlan Trustee Join Date: Jul 2007 Location: New Zealand Posts: 1,180	Re: Storm sounds Hi Greg Re your clipping sound example...hmmmm...I'm fully aware that after a life time of running power tools (many years without earmuffs!!!) I've lost some of my hearing...however...I can't hear any distortion, just increased volume. Maybe the distortion is in a frequency that I can no longer hear...

May 20th, 2015, 06:22 AM	#19
Greg Miller Trustee Join Date: Jan 2011 Location: Pennsylvania Posts: 1,792	Re: Storm sounds Don't you hear the additional upper harmonics created by the clipping? Here's a spectral view. The single red spike is the 440Hz fundamental from the first tone sample (the one at -6dBFS). The green spikes are the harmonics added in by moderate clipping in the second tone sample. The blue spikes are the additional (and higher level) harmonics added by the heavier clipping in the third sample. The distortion products start with the second harmonic, located at 880Hz. Surely you can hear that frequency, or you'd be unable to understand speech. The first really loud harmonic is the third harmonic at 1,320Hz. Again, you need that frequency to be able to understand speech. If you still can't hear these when listening closely, maybe I can devise another example file. Attached Thumbnails