Hi Power Xhaust!..* OUT!
Yeah, I forgot dB is an exponential scale... but I could swear I remember hearing that number somewhere. Like I said, 70-something, not 70 flat. I thought it was actually 78 or 79...
So that's three important specs I'd really like to know (and I'm sure a lot of people here, too):
- HP gain
- dB gain
- Weight gain/loss (hopefully loss)
So that's three important specs I'd really like to know (and I'm sure a lot of people here, too):
- HP gain
- dB gain
- Weight gain/loss (hopefully loss)
Driver
Joined: Oct 2006
Posts: 136
Likes: 0
From: CA
Driver
Joined: Oct 2006
Posts: 136
Likes: 0
From: CA
Isn't the HKS Carbon TI exhaust the HI Power with a carbon muffler/tip? If so then I would guess this clip from youtube would be basically what it sounds like.. http://www.youtube.com/watch?v=21YS52IBrkc
http://s51.photobucket.com/albums/f3...t=MOV00271.flv
Last edited by Hutch27; Jan 10, 2007 at 11:38 PM.
Lexus Champion
Joined: Jun 2003
Posts: 1,680
Likes: 8
From: Oregon
I believe you might be confusing the actual power requirements to double the output of an acoustic speaker with your 3db = double the sound.
IE: if it takes 10 watts to produce 10 db of sound, it will take 20 watts to produce 13 db's of sound from the same speaker. Put another way, you'll have to double the power of the amplifier to attain an additional 3 db of sound.
Put another way, 53 db is not twice as loud as 50 db. 100 db is twice as loud as 50 db, however.
One of us is confused and it could very well be me (coming from a liberal arts background).
I believe you might be confusing the actual power requirements to double the output of an acoustic speaker with your 3db = double the sound.
IE: if it takes 10 watts to produce 10 db of sound, it will take 20 watts to produce 13 db's of sound from the same speaker. Put another way, you'll have to double the power of the amplifier to attain an additional 3 db of sound.
Put another way, 53 db is not twice as loud as 50 db. 100 db is twice as loud as 50 db, however.
I believe you might be confusing the actual power requirements to double the output of an acoustic speaker with your 3db = double the sound.
IE: if it takes 10 watts to produce 10 db of sound, it will take 20 watts to produce 13 db's of sound from the same speaker. Put another way, you'll have to double the power of the amplifier to attain an additional 3 db of sound.
Put another way, 53 db is not twice as loud as 50 db. 100 db is twice as loud as 50 db, however.
I was a little off on the 50 dB being the level of a quet room, but here is a good explanation about how dB works. Here is a chart from that page.
- Near total silence - 0 dB
- A whisper - 15 dB
- Normal conversation - 60 dB
- A lawnmower - 90 dB
- A car horn - 110 dB
- A rock concert or a jet engine - 120 dB
- A gunshot or firecracker - 140 dB
Lexus Champion
Joined: Jun 2003
Posts: 1,680
Likes: 8
From: Oregon
I was a little off on the 50 dB being the level of a quet room, but here is a good explanation about how dB works. Here is a chart from that page.
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Here's some info from answers.com:
Unit for measuring the relative intensities of sounds or the relative amounts of acoustic or electric power. Because it requires about a tenfold increase in power for a sound to register twice as loud to the human ear, a logarithmic scale is useful for comparing sound intensity. Thus, the threshold of human hearing (absolute silence) is assigned the value of 0 dB and each increase of 10 dB corresponds to a tenfold increase in intensity and a doubling in loudness.
If indeed, a normal conversation is 15 times louder than a whisper, it looks like we would have to increase our effort 150x to hold a normal conversation v. a whisper. It also appears (from this definition at least) that it requires 10db to double the sound.
Last edited by al503; Jan 11, 2007 at 10:57 AM.
We are definitely going off topic, so I just have one more thing to say about dB. 
As I mentioned earlier, the human ear does not experience 3 dB as a true "double", but that doesn't mean that it isn't really double. The reason why it takes 10X the power to get double the sound from a speaker is because you are still just using 1 speaker. If you double the total power AND quantity of speakers, you will get a 3 dB increase in sound, but it still may not "sound" like double to a human ear.
If you think about it, how good do you think humans are at determining "double" intensity of anything (heat, light, flavor, odor, electric shock)? I don't know if I could tell that 2 60 watt light bulbs really puts out twice as much light as 1 60 watt bulb. I also know that the difference between hypothermia and heat stroke for a human is a pretty small change in temperature. Not all senses are created equal.
As I mentioned earlier, the human ear does not experience 3 dB as a true "double", but that doesn't mean that it isn't really double. The reason why it takes 10X the power to get double the sound from a speaker is because you are still just using 1 speaker. If you double the total power AND quantity of speakers, you will get a 3 dB increase in sound, but it still may not "sound" like double to a human ear.
If you think about it, how good do you think humans are at determining "double" intensity of anything (heat, light, flavor, odor, electric shock)? I don't know if I could tell that 2 60 watt light bulbs really puts out twice as much light as 1 60 watt bulb. I also know that the difference between hypothermia and heat stroke for a human is a pretty small change in temperature. Not all senses are created equal.
Lexus Test Driver
Joined: Apr 2006
Posts: 1,271
Likes: 0
From: IL
Not at all. It is very different. Here check it out.
http://s51.photobucket.com/albums/f3...t=MOV00271.flv
http://s51.photobucket.com/albums/f3...t=MOV00271.flv
sounds less "deep tone" than i thought it would be.. compared to HKS products for other cars.. or maybe its just the difference in sound clip quality.
Pole Position
Joined: Sep 2006
Posts: 274
Likes: 0
From: Fort Worth, Texas
AHHHH damnit...
This whole time I thought you had a 350 for some reason.. I bet it sounds like that clip I posted on a 350.. Oh and I do not mean any offense I just wanted an acurate example before I purchase
This whole time I thought you had a 350 for some reason.. I bet it sounds like that clip I posted on a 350.. Oh and I do not mean any offense I just wanted an acurate example before I purchase
Driver
Joined: Oct 2006
Posts: 136
Likes: 0
From: CA
Unfortunately I don't have a video so this is coming out from my camera. The sound quality is not there but I can assure you that it's deeper and louder than it sounds fromt the clip.