Re: Frequency humps and dips
I'm curious to take some measurements to see how the windows affect the output. I had brought up the idea of doing some plots with the windows either open or covered in such a way that they are not an issue, and compare it to a plot with the windows closed (exposed). I know that you can't really do very much to counteract glass, but until you eliminate them from the equation, you can't see what other problems exist.
Re: Frequency humps and dips
My car sounds VASTLY different with the front windows down
Re: Frequency humps and dips
Yeah, and I'm sure all cars do. My point is if you have a problem with a certain frequency and you attribute it to reflection off the window, it's possible that it's not the window, but an issue elsewhere. How will you know unless you eliminate the window from the equation?
Re: Frequency humps and dips
My issues, same freq, opposite effect, is caused by the footwell building up. When you remove the console it mostly goes away.
Re: Frequency humps and dips
I can developed the window thing even further, check it........when I open a window (front) the stage changes, of course already been mentioned....but try this...as I open and close, or make minute changes in size of opening, it changes as well. Its funny because I've tuned my car with open and closed, just for fun, and the changes to the tunes are miniscule...but the changes to the sound are not. The changes in the stage with small increment adjustments to the window level demonstrate just how much reflections are influencing my sound. Its amazing that such small angle changes of the reflective surface, can so dramatically change what you're hearing!
Re: Frequency humps and dips
Does hanging softer surfaces, towels, sweatshirts, et cetera over the hard surfaces noticably change the reflections ?
Re: Frequency humps and dips
I don't know.....ill try and get back.
Re: Frequency humps and dips
it makes a big difference in the higher freq's. A 1" towel or foam will only absorbs freqs like 3.5 KHz and above if I did my math right, so not much for mids/lows