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In response to my “Pink noise versus white noise” video I was asked if, when doing time correction in car audio whether you should use pink or white noise to measure it? Well I’m not really familiar with car audio but that said let’s just think through it together. It’s a really small space, so you’re going to have all kinds of issues standardizing the measurements and stuff like that so my best guess is pink noise would be the best one to use. But white noise is for analyzing your equipment, pink noise, more closely resembles human hearing. So I don’t think it would matter, I don’t think it would be more different than room acoustic, it’s just the car is a smaller room with oh my gosh glass everywhere.

The car is the worst scenario you can have in room acoustics. It’s too small and it’s surrounded by glass. It’s got some things going for it. It’s usually got a steel shell so that’s good because it keeps some noise out but the car is a terrible acoustic environment. I don’t care how many speakers you put in it or what kind of processing you use to get sound quality out of it, it’s a poor environment. So I don’t spend too much time thinking about cars.

Ali: Very good, although you’ve designed a bass absorber for cars.

Dennis: Well yeah we have a new bass absorber that I’m testing right now for cars and it’s very good, it’s very powerful, it’s 80 pounds so I’m working on trying to lighten it up a little bit and maybe make it a little smaller and stuff like that. But yeah it’s great. It’s just the ACDA-10 so we get broadband absorption from 30 to 400 cycles and you put some foam on it you can go all the way to 6,300. So it’s a good product, good tool, something probably for next year.

Dennis Foley

I am an acoustic engineer with over 30 years’ experience in the business. My technology has been used in Electric Lady Land Studios, Sony Music of New York, Cello Music and Films founded by Mark Levinson, and Saltmines Studios in Mesa, Arizona, along with hundreds of others.

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