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Car Audio

By September 8, 2011March 10th, 2012No Comments

I have been covering all the interior surfaces of our company car with our foam technology. I have our 2″ foam on the dash board and our 1/2″ foam on the windshield itself. I have our 1/2″ foam positioned between the speaker and the glass to minimize that first reflection point. The problem is keeping the tape stuck to the window when the outside air temperature is 120 degrees in the Sonora desert. There is 1/2″ on the ceiling and the rear windows. My goal is to over absorb this glass “fishbowl” and then peel back certain surfaces and hear what happens to the total sonic picture as far as absorption is concerned. Who knows if over absorption is even possible in a “fishbowl” let alone good sounding car audio.

The car audio sound system is made by bounce energy everywhere Bose and it does fill the “bowl” with sound energy from front and rear speakers. There are adjustments for bass, treble, and even mid range. One can use the fader control and change the energy distribution pattern between front and rear speaker systems. There is also a left/right balance control.

The auto or truck is at best your worst acoustical nightmare. What kind of room is this? Glass windshield front wall. Not only is the windshield made of glass, it is shaped in a convex manner to reduce air flow resistance on the outside of the vehicle and direct all the glass reflections back at the driver and front seat passenger on the inside. Yikes! Our side walls are also made of glass right at the ear level which is that critical listening plane. Rear walls are glass and if you push the right button on the console, the ceiling turns into glass also. Yeah ! more glass.

Stay tuned for sound checks.


I am a structural engineer as well as a master furniture maker. I design cabinets for low frequency, activated carbon absorbers. Connect with me on Google+

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