For this car you would really need to go nuts and do everything. Not worth it IMO, put music louder or get a nice exhaust to listen too, you will not make this car a Lexus. But go for it.

I disagree that you have to go nuts. I've only done the trunk and back seat area with a minimal application of Dynamat so far, and there's been a nice difference. Sure it'll never be a Lexus, but if I can take the edge off the road noise, with a minimal weight gain (<30lb total) that'll be satisfactory.

the only thing i've sound dampened was the trunk lid and rear parcel shelf. and only because i could hear both of them rattling all the time. the rest of the car i haven't touched and don't see a significant need to.

For rattles I totally agree. I have some dynamat in key places that seemed to make noise. But this car is light and tinny.

sry, asking the same question here (https://www.ft86club.com/forums/show...2&postcount=48) since this thread is specifically on sound proofing:

Does this approach work just as well for general sound deadening? or is it just for killing resonance for better audio quality. I'm trying to make my car quieter from road/wind/tire noise

EDIT UPDATE since I may as well update both comments:

Edit: I ended up doing it like #2. Out of lazyness more than anything else. I'm gonna measure it now

Edit with update "measurements" on a Samsung S20 FE with some app. 76db going 70mph with the seats up became 73db going 70mph with the seats up. Seats down measurements were basically the same, and 80mph the measurements were basically the same. I am very wary of "placebo-ing" myself, but listening to afunkydiabetic on youtube (a talker) I find myself setting the volume in the 30s now instead of the 50s. This is true months later. I used to always have volume in the 50s with my phone volume all the way up. Subjectively it seems quite a bit quieter.

I've done it exclusively to make the car quieter, actually. Any improvement in audio quality is just icing on the cake.

yes.

the idea to sound deadening is to reduce external noise. in audio, the idea is to reduce unwanted noise from intruding on the wanted noise. in your case, you're just skipping the 'audio' portion.

Ironically, after I added some cheap Peel and Seal to these places I got into audio. Probably not going to go all out in my car but I wish I had just added foam and vinyl while i was in there. I'm gonna upgrade the resonator on my TRD catback and see if i can at least hear the bass in my music at reasonable volume and go from there before I spend 20+ hours tearing my interior out again.

EDIT: resonator barely did anything. There is a measureable difference using a phone app, but its not nearly enough. https://www.ft86club.com/forums/show...6&postcount=35 for more detailed updates