All,
As promised, I measured the acoustic spectrum of my factory T2 PS4S with the acoustic foam liner vs. the 20” track package sized PS4S without the foam liner. The results surprised me. Let’s just say I am no longer concerned about having acoustic foam in my tires.
I measured the acoustic spectrum at the same speed and on the exact same 1 mile stretch of highway. Note that the rim sizes are different, as are the actual tire sizes since I purchased the PS4S tires for the track package on my Model S Plaid.
First up, the 21” T2 PS4S with the acoustic foam in them:
Next up are the Track Package sized PS4S without acoustic foam:
If you compare the average values (not the instantaneous or max), the acoustic foam accounts for .3 dB of difference. By the way, it is important to note that the spectrums are slightly different, and some folks might be sensitive to the differences. I am definitely not one of those people. The tires sound identical to my ears.
Hope this helps if someone is concerned about whether or not acoustic foam makes a difference, and if so, how much of a difference.
Joe
As promised, I measured the acoustic spectrum of my factory T2 PS4S with the acoustic foam liner vs. the 20” track package sized PS4S without the foam liner. The results surprised me. Let’s just say I am no longer concerned about having acoustic foam in my tires.
I measured the acoustic spectrum at the same speed and on the exact same 1 mile stretch of highway. Note that the rim sizes are different, as are the actual tire sizes since I purchased the PS4S tires for the track package on my Model S Plaid.
First up, the 21” T2 PS4S with the acoustic foam in them:
Next up are the Track Package sized PS4S without acoustic foam:
If you compare the average values (not the instantaneous or max), the acoustic foam accounts for .3 dB of difference. By the way, it is important to note that the spectrums are slightly different, and some folks might be sensitive to the differences. I am definitely not one of those people. The tires sound identical to my ears.
Hope this helps if someone is concerned about whether or not acoustic foam makes a difference, and if so, how much of a difference.
Joe