Fast Bass

[]0[][]v[][]0 · 18th December 2005, 04:04 AM

I've noticed a phenomenom, or maybe I'm just stupid. It seemed that at stand-still, or low speeds, that there seemed to be more bass than when traveling at highway speeds.

Now mind you, this is in a 2000 Mustang with a 15" Titanic with more than 500 watts going to it.

Volenti · 18th December 2005, 04:21 AM

Is this with the windows down or up? The bass response can be quite different (typically louder) with the windows down (car turns into a big bandpass box with the window opening as a port)

I could imagine that at speed the air rushing past/into the car could disturb the front chamber resonance (cabin space) enough to reduce bass output.

[]0[][]v[][]0 · 18th December 2005, 05:01 AM

I made sure to test this phenomenom with the windows up for both situations. It may be the case that I was expecting something, after I thought I noticed a difference.

DSP_Geek · 18th December 2005, 05:40 AM

You'd be surprised at how much low frequency energy increases with speed in a car, especially if you have the performance package. That could have the effect of masking woofer output if you listen at any volume below insane.

GuyPanico · 18th December 2005, 04:51 PM

I'm almost positive this has to do with road noise. My car stereo sounds best, and fullest, with the windows up and the car not running. At speed I too have noticed I need a little more bass.

Cal Weldon · 18th December 2005, 05:24 PM

Guy,

I believe you're correct and to be honest, I had taken it as a given.

quickshift · 18th December 2005, 06:48 PM

Yeah, I agree. It's road noise.

I have a pretty solid and well built car, it's not noisy compared to many but I have to turn the volume right up to overcome road noise on the motorway. As a driver, I'm not really consciously aware of road noise when the stereo is off, I guess I just tune it out.

opp · 18th December 2005, 06:48 PM

According to wikipedia (http://en.wikipedia.org/wiki/Horsepower) 1W = 1/ 735.49875 HP.

So you got a 0.68 HP Mustang - no wonder speed is a concern.

12” on a Mustang…………………. Not exactly low profile.

Sorry … thought this was DIYauto.

anyway

quickshift · 18th December 2005, 07:00 PM

Clicky linkies.

http://www.physik.uni-oldenburg.de/a...01.pdf#search='road%20noise%20frequency'

http://www.mscsoftware.com/support/l...00.pdf#search='road%20noise%20frequency'

newfinish · 18th December 2005, 09:41 PM

that is because of the harmonics coming from the car,the different vibrations absorbes the bass or gives more depending on frequencies

18th December 2005, 04:04 AM	#1
[]0[][]v[][]0 diyAudio Member Join Date: Dec 2005 Location: Ohio	Fast Bass I've noticed a phenomenom, or maybe I'm just stupid. It seemed that at stand-still, or low speeds, that there seemed to be more bass than when traveling at highway speeds. Now mind you, this is in a 2000 Mustang with a 15" Titanic with more than 500 watts going to it.

18th December 2005, 05:24 PM	#6
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Guy, I believe you're correct and to be honest, I had taken it as a given. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

18th December 2005, 06:48 PM	#8
opp diyAudio Member Join Date: Jul 2005 Location: Aros	According to wikipedia (http://en.wikipedia.org/wiki/Horsepower) 1W = 1/ 735.49875 HP. So you got a 0.68 HP Mustang - no wonder speed is a concern. 12” on a Mustang…………………. Not exactly low profile. Sorry … thought this was DIYauto. anyway __________________ time flies like an arrow ... and fruit flies like a banana

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18th December 2005, 04:21 AM	#2
Volenti diyAudio Member Join Date: Aug 2003 Location: Australia	Is this with the windows down or up? The bass response can be quite different (typically louder) with the windows down (car turns into a big bandpass box with the window opening as a port) I could imagine that at speed the air rushing past/into the car could disturb the front chamber resonance (cabin space) enough to reduce bass output.

18th December 2005, 05:01 AM	#3
[]0[][]v[][]0 diyAudio Member Join Date: Dec 2005 Location: Ohio	I made sure to test this phenomenom with the windows up for both situations. It may be the case that I was expecting something, after I thought I noticed a difference.

18th December 2005, 05:40 AM	#4
DSP_Geek diyAudio Member Join Date: Aug 2003 Location: Santa Cruz, California	You'd be surprised at how much low frequency energy increases with speed in a car, especially if you have the performance package. That could have the effect of masking woofer output if you listen at any volume below insane.

18th December 2005, 04:51 PM	#5
GuyPanico diyAudio Member Join Date: Mar 2005 Location: Euless, TX	I'm almost positive this has to do with road noise. My car stereo sounds best, and fullest, with the windows up and the car not running. At speed I too have noticed I need a little more bass.

18th December 2005, 06:48 PM	#7
quickshift diyAudio Member Join Date: Jun 2005 Location: West London	Yeah, I agree. It's road noise. I have a pretty solid and well built car, it's not noisy compared to many but I have to turn the volume right up to overcome road noise on the motorway. As a driver, I'm not really consciously aware of road noise when the stereo is off, I guess I just tune it out.

18th December 2005, 07:00 PM	#9
quickshift diyAudio Member Join Date: Jun 2005 Location: West London	Clicky linkies. http://www.physik.uni-oldenburg.de/a...01.pdf#search='road%20noise%20frequency' http://www.mscsoftware.com/support/l...00.pdf#search='road%20noise%20frequency'

18th December 2005, 09:41 PM	#10
newfinish diyAudio Member Join Date: Jul 2005 Location: Quebec	that is because of the harmonics coming from the car,the different vibrations absorbes the bass or gives more depending on frequencies

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