Decibel Measures
Back during the day of actual records sometimes they would skip and repeat the same line over and over, funny stuff.
Recovery Vehicle
Joined: Sep 2009
Posts: 916
Likes: 1
From: Quarryville, Pa
Replace your door seals with D2 door seals itll be night and day different. As far as it being a little louder going up a hill that would make sence since the motor will be working harder.
Super Moderator
Joined: Jan 2011
Posts: 16,322
Likes: 88
From: Savannah Georgia
Sorry it took so long. Here are my sound readings, done with a Bruel & Kjaer 2238 sound level meter, which costs several times what my Disco did:
In my office, no HVAC running - 27.0
In the Disco, not running - 33.0
Parked, no AC or heat on, windows up, no sun roofs.
700 rpm - 50.2
1000 rpm - 54.3
1500 rpm - 57.4
2000 rpm - 62.0
On the road, asphalt, street tires
20 mph - 60.0
30 mph - 63.9
40 mph - 65.7
50 mph - 67.1
60 mph - 69.7
70 mph - 71.5
hard to duplicate sound tests outdoors, humidity, temperature play a part. So does tire tread, type and age of pavement, shock types and age, bushings, weather strips, orientation of microphone, whine from transfer case, exhaust leak noise, etc.
But for a 10 db change in loudness I had to go 40 - 50 mph faster, which seems more than the increase you would get going up a hill in the same gear. My gaskets are bone stock, bone dry rotted, and original to the chassis as far as I know.
In my office, no HVAC running - 27.0
In the Disco, not running - 33.0
Parked, no AC or heat on, windows up, no sun roofs.
700 rpm - 50.2
1000 rpm - 54.3
1500 rpm - 57.4
2000 rpm - 62.0
On the road, asphalt, street tires
20 mph - 60.0
30 mph - 63.9
40 mph - 65.7
50 mph - 67.1
60 mph - 69.7
70 mph - 71.5
hard to duplicate sound tests outdoors, humidity, temperature play a part. So does tire tread, type and age of pavement, shock types and age, bushings, weather strips, orientation of microphone, whine from transfer case, exhaust leak noise, etc.
But for a 10 db change in loudness I had to go 40 - 50 mph faster, which seems more than the increase you would get going up a hill in the same gear. My gaskets are bone stock, bone dry rotted, and original to the chassis as far as I know.
Sorry it took so long. Here are my sound readings, done with a Bruel & Kjaer 2238 sound level meter, which costs several times what my Disco did:
In my office, no HVAC running - 27.0
In the Disco, not running - 33.0
Parked, no AC or heat on, windows up, no sun roofs.
700 rpm - 50.2
1000 rpm - 54.3
1500 rpm - 57.4
2000 rpm - 62.0
On the road, asphalt, street tires
20 mph - 60.0
30 mph - 63.9
40 mph - 65.7
50 mph - 67.1
60 mph - 69.7
70 mph - 71.5
hard to duplicate sound tests outdoors, humidity, temperature play a part. So does tire tread, type and age of pavement, shock types and age, bushings, weather strips, orientation of microphone, whine from transfer case, exhaust leak noise, etc.
But for a 10 db change in loudness I had to go 40 - 50 mph faster, which seems more than the increase you would get going up a hill in the same gear. My gaskets are bone stock, bone dry rotted, and original to the chassis as far as I know.
In my office, no HVAC running - 27.0
In the Disco, not running - 33.0
Parked, no AC or heat on, windows up, no sun roofs.
700 rpm - 50.2
1000 rpm - 54.3
1500 rpm - 57.4
2000 rpm - 62.0
On the road, asphalt, street tires
20 mph - 60.0
30 mph - 63.9
40 mph - 65.7
50 mph - 67.1
60 mph - 69.7
70 mph - 71.5
hard to duplicate sound tests outdoors, humidity, temperature play a part. So does tire tread, type and age of pavement, shock types and age, bushings, weather strips, orientation of microphone, whine from transfer case, exhaust leak noise, etc.
But for a 10 db change in loudness I had to go 40 - 50 mph faster, which seems more than the increase you would get going up a hill in the same gear. My gaskets are bone stock, bone dry rotted, and original to the chassis as far as I know.
My $1500 budget for repairs is proving to be much too small. Right now I am at $1900 and have another couple of thousand left to go. A part of me feels a pinch of regret...
Super Moderator
Joined: Jan 2011
Posts: 16,322
Likes: 88
From: Savannah Georgia
Well, my sensor position was in the storage box at the end of the console, but maybe a foot above it. And I did not notice the big increase on my only hill, an expressway ramp. Your new gaskets are an improvement over mine, basically providing none of the road, tranny, and transfer case noise (just the 62 db of engine - but mine could also have an exhaust leak). What would be interesting is if same test could be done on RoxieMoxies's "new" D2, she bought one with only 117 miles on it from an eccentric previous owner.
As for sound tests for other years, you can bet Land Rover has them, but if they were something to brag about the sales department would have promoted it.
As for sound tests for other years, you can bet Land Rover has them, but if they were something to brag about the sales department would have promoted it.
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