Movie sound frequencies?

[spaceape]

Can anyone tell me approximately how high up in Hertz the standard movie audio track can go? Or at what frequencies it usually works at.

Thanks.

[spaceape]

I came across this on the web firstly the highest "official" musical note at 2093Hz. Link

And this:

2KHz / 2000 Hz Test tone / Sound - Tweeter Test - YouTube

Making in my mind the from around 20Hz (~60Hz for for music)-2000Hz the most important frequency range too try and have free of ringing and reflective sound for one too have a fully enjoyable movie and music experience. However i don't think i ever hear much material ever even reach 1000Hz when i watch movies and listen too music.

Anyone who better understands this? A bit hard too find much online material on this.

[Ethan Winer]

Originally Posted by spaceape

Can anyone tell me approximately how high up in Hertz the standard movie audio track can go?

The range of audible frequencies is from below 20 Hz up to about 20 KHz. If you're older than 30 years the highest frequency you can hear is likely less than 20 KHz, and if you're over 50 or 60 it could be more like 12 to 14 KHz. Most videos use an audio sample rate of 48 KHz, which limits the highest frequency possible to about 22 KHz.

--Ethan

[spaceape]

Originally Posted by Ethan Winer

The range of audible frequencies is from below 20 Hz up to about 20 KHz. If you're older than 30 years the highest frequency you can hear is likely less than 20 KHz, and if you're over 50 or 60 it could be more like 12 to 14 KHz. Most videos use an audio sample rate of 48 KHz, which limits the highest frequency possible to about 22 KHz.

--Ethan

Thanks for your help Ethan. The reason i ask is because of my diy acoustic panels. I were a bit dumb and made them all with Owens Corning 705 type insulation slabs and wrapped in microsuede fabric which gradually start reflecting sound waves at 2KHz and above.

Im aware that the potential audio range of the speaker is much bigger. I was just interested in knowing if anyone had any knowledge on what frequencies movies and music normally play at.

Next month i first had arranged too purchase 6 Tri-Traps from GIKs plant in England but another and possibly better solution would be too take the 6 panels i have at my rear wall (4" with a 2" airgap) down and use them for the wall to ceiling corners instead. Then purchase 6-7 artpanels. This way my room wont be so dark and boring. Also maybe better too have a bit lighter room for when i someday get bored of using a projector.

This is some of my latest REW measurements. Not terrible but could still need some improvements right?





I have absolutely no treatment in the top corners, so this will surely help making it sound better.

[spaceape]

This is the test results from ATS Acoustics for their microsuede panels:



Doesn't look terrible but not the best high frequency absorption either. So if i use these panels in the corners they should be a bit better suited right?

Strangely they didn't measure under 100Hz or above 5000Hz.

Here are the report. http://www.myupload.dk/showfile/1uIrVrmBK.pdf

[Ethan Winer]

Dense fabric like suede improves absorption at bass frequencies, but reduces it at higher frequencies. So you want one type in corners for bass trapping, away from direct reflections, and the other type at reflection points and behind you.

--Ethan

[spaceape]

Originally Posted by Ethan Winer

Dense fabric like suede improves absorption at bass frequencies, but reduces it at higher frequencies. So you want one type in corners for bass trapping, away from direct reflections, and the other type at reflection points and behind you.

--Ethan

Why does it absorb better at bass frequencies you think? Is it because the fabric vibrates next too the rockwool or that the inability too absorb those higher frequencies makes more room for the bass?

Hehe newbie question.

Well then i think i'll swap a good deal of my microsuede panels for GIK Acoustics ones and place the microsuede ones at the top corners. Never a bad idea too be a bit economical.