I recently did some sound deadening in my car. I did a before and after reading using a DB meter app on my iPhone expecting to see a reduction. To my surprise no change peak DB was the same, while I was experiencing a quieter ride. Something else I experienced is the car felt faster at the same speeds, I guess because it’s quieter idk it’s weird not something I was expecting. Anyway I certainly understand what you are saying about a one dimensional reading. I’ve only used REW in my HT and have never considered using it my car but I’m starting to feel like I’m going to fall face first into a rabbit hole.
That’s really amazing of you to show the differences. This is what I don’t like about car audio and please I mean no offense. I’m 54 and not some kid with nothing to do and just bashing things online. It’s a not bad reduction actually, but in the grand scheme of things it’s just not really possible as low freq just bleed through everything. Or else our subs in the trunk wouldn’t work. What is my take away from this as a 54 year old and musician is I think people should take into strong consideration having rear speakers in their car as well for everyday listening and/or as an option. Why? Because if your noise floor in your car is around 70db and I’m talking at best, then it is super duper easy as you know Nick to go over 95db while listening in the car. That’s not the best thing for our ears. And our ears are our most important gear. Again kudos to the videos and work you did Nick. ( btw I’m also Nick as well, Greek of course. Lol) Cheers man
This is a really interesting series, as someone who always wanted a 911, I love the performance and how it drives, but I passed on it because of cabin noise during my test drive. I’d be really curious to know what the end result sounds like. The graphs are nice but it would be cool to see a video where we can hear the difference in the recordings. Also, how would you characterize the final result, is the interior cabin noise close to a normal vehicle?
By these published results, the cabin noise should be close to the average vehicle in all but the lowest frequencies where low profile tire rumble will be present. The 911 models with smaller (19/20") wheels and thus higher tire sidewall should be a little better, however the best Porsche's sports car in this regard is the Boxster since its cabin doesn't resonate the engine and rear tire noises like 911s and Caymans do.
@@lukeblacksmith7422 thanks for the explanation. Sadly the Boxster and Cayman’s are a little too small for my height. One runs into limited leg room and sufficient height in the roof. The 911 felt just right other than the noises.
I've been able to do a similar test in my Lincoln Navigator. Did you really have the averages set to Forever? I've found that is basically a peak level, not an actual average. So if you hit a pothole on one run and not on the other you'll get a very different reading. I found a good compromise is to set the averages to 8. All I have to do is be steady for about 2 or 3 seconds and then I can do a snapshot. I chose a steady 70 mph speed on a certain section of freeway. I did a couple of snapshot averages on both concrete and black top. This let's me see what frequencies the tire noise is at and I can do a lot of before and after comparisons. I also found that no smoothing basically gives me too many jagged bumps. I chose to go with 1/6 smoothing. 1/6 actually looks like what you're showing on the screen. On black top I saw a 4 to 5 dB reduction from 150hz to 400hz. And a 3 to 6dB reduction from 600hz to 7,000hz. Not exactly the same on the louder concrete surface, but still very similar. The difference is very noticeable and can be considered whisper quiet at 70 mph. This is just adding cld to the front doors, front floors and rear floor sheet metal. I can tell there's still room for improvement. Expect another order from me soon. 👍
@NicoleHuntah unfortunately not. It's been very difficult to get this video even started since there is so much footage and so many recordings that it's a very time consuming project that I didn't expect.
@@ResoNixSoundSolutionsall good nick! Just wanted to make sure. This is all a lot of work so thank you for creating it and documenting as much of the install as you have.
I recently did some sound deadening in my car. I did a before and after reading using a DB meter app on my iPhone expecting to see a reduction. To my surprise no change peak DB was the same, while I was experiencing a quieter ride. Something else I experienced is the car felt faster at the same speeds, I guess because it’s quieter idk it’s weird not something I was expecting. Anyway I certainly understand what you are saying about a one dimensional reading. I’ve only used REW in my HT and have never considered using it my car but I’m starting to feel like I’m going to fall face first into a rabbit hole.
Glad I was able to explain why :)
That’s really amazing of you to show the differences.
This is what I don’t like about car audio and please I mean no offense. I’m 54 and not some kid with nothing to do and just bashing things online.
It’s a not bad reduction actually, but in the grand scheme of things it’s just not really possible as low freq just bleed through everything. Or else our subs in the trunk wouldn’t work.
What is my take away from this as a 54 year old and musician is I think people should take into strong consideration having rear speakers in their car as well for everyday listening and/or as an option.
Why?
Because if your noise floor in your car is around 70db and I’m talking at best, then it is super duper easy as you know Nick to go over 95db while listening in the car.
That’s not the best thing for our ears.
And our ears are our most important gear.
Again kudos to the videos and work you did Nick. ( btw I’m also Nick as well, Greek of course. Lol)
Cheers man
I'm not understanding your logic here. How does adding speakers to the rear have any benefit?
This is a really interesting series, as someone who always wanted a 911, I love the performance and how it drives, but I passed on it because of cabin noise during my test drive. I’d be really curious to know what the end result sounds like. The graphs are nice but it would be cool to see a video where we can hear the difference in the recordings.
Also, how would you characterize the final result, is the interior cabin noise close to a normal vehicle?
By these published results, the cabin noise should be close to the average vehicle in all but the lowest frequencies where low profile tire rumble will be present. The 911 models with smaller (19/20") wheels and thus higher tire sidewall should be a little better, however the best Porsche's sports car in this regard is the Boxster since its cabin doesn't resonate the engine and rear tire noises like 911s and Caymans do.
@@lukeblacksmith7422 thanks for the explanation. Sadly the Boxster and Cayman’s are a little too small for my height. One runs into limited leg room and sufficient height in the roof. The 911 felt just right other than the noises.
I've been able to do a similar test in my Lincoln Navigator.
Did you really have the averages set to Forever? I've found that is basically a peak level, not an actual average. So if you hit a pothole on one run and not on the other you'll get a very different reading. I found a good compromise is to set the averages to 8. All I have to do is be steady for about 2 or 3 seconds and then I can do a snapshot.
I chose a steady 70 mph speed on a certain section of freeway. I did a couple of snapshot averages on both concrete and black top. This let's me see what frequencies the tire noise is at and I can do a lot of before and after comparisons.
I also found that no smoothing basically gives me too many jagged bumps. I chose to go with 1/6 smoothing. 1/6 actually looks like what you're showing on the screen.
On black top I saw a 4 to 5 dB reduction from 150hz to 400hz.
And a 3 to 6dB reduction from 600hz to 7,000hz.
Not exactly the same on the louder concrete surface, but still very similar.
The difference is very noticeable and can be considered whisper quiet at 70 mph. This is just adding cld to the front doors, front floors and rear floor sheet metal.
I can tell there's still room for improvement. Expect another order from me soon. 👍
Whats the exact behriger audio Interface model are you using to take these measurements?
Where is the before and after recording video?
Sorry, I have been extremely busy and youtube videos have been on hold. I will get to it soon :)
@@ResoNixSoundSolutionshi there! Have these been uploaded somewhere else yet? Thanks for the videos!
@NicoleHuntah unfortunately not. It's been very difficult to get this video even started since there is so much footage and so many recordings that it's a very time consuming project that I didn't expect.
@@ResoNixSoundSolutionsall good nick! Just wanted to make sure. This is all a lot of work so thank you for creating it and documenting as much of the install as you have.
@NicoleHuntah thank you. Trying my best :)