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[ms700]

to put it in perspective, the following table shows how loud for how long till permanent hearing damage starts.

85 dB 8 hours

88 dB 4 hours

91 dB 2 hours

94 dB 1 hour

97 dB 30 minutes

100 dB 15 minutes

103 dB 7.5 minutes

106 dB < 4min

109 dB < 2min

112 dB ~1 min

115 dB ~30 sec

So as I suggested for all of those of you who like their music loud turn it down a bit.

Me and my XB Panelvan used to compete in IASCA, and people still wonder why I dont go cruisin with it at full noise, considering it used to punch regular 155 db's...

[Trough Lolly]

to put it in perspective, the following table shows how loud for how long till permanent hearing damage starts.

85 dB                           8 hours

88 dB                           4 hours

91 dB                             2 hours

94 dB                             1 hour

97 dB                             30 minutes

100 dB                             15 minutes

103 dB                             7.5 minutes

106 dB                             < 4min

109 dB                             < 2min

112 dB                              ~1 min

115 dB                              ~30 sec

So as I suggested for all of those of you who like their music loud turn it down a bit.

Me and my XB Panelvan used to compete in IASCA, and people still wonder why I dont go cruisin with it at full noise, considering it used to punch regular 155 db's...

got proof?

not doubting it ,but I know my sh*t when it comes to dB drags and SQ events.. and 155+ in a panel van of everything is a farking huge ask. I mean cmonn a XB panelvan would have the interior resonant frequency of atleast 65hz.. whereas smaller cars such as hatchbacks have a smaller res frq such as 42hz due to decreased cabin preasure and can tune their ports easier to suit..

a few boys I talk to at www.caraudioaustralia.com forums are regular competitors and record breakers at aussie wide dB drags and they own tiny assed hatchbacks with 2x Digital designs 9515's and 4+ Earthquake D3 amps and even their only just scraping 158ish. not to mention they all run ATLEAST 8 batteries!

BTW nyopa, that post was the biggest load of BS ive read ina long time. I dunno what scab assed site u pulled that from but I suggest trying another source of info.

EDIT: id also like to know what dB meter you used, as if it was anythign less than an audiocontrol meter or a termpro, then those specs done mean a thing.

Edited 19/10/04 01:55 PM by Trough Lolly

[Guest jteale]

BTW nyopa, that post was the biggest load of BS ive read ina long time. I dunno what scab assed site u pulled that from but I suggest trying another source of info.

Mate,

I see by you bio you are born in 1985 and currently 19 odd ... and by other posts been into car audio for four years ... how on earth do you have any idea what impact this sustained high outputs is having on your hearing ... when I was 19 I thought I new everything too!

I have a Lux Pack and went to see what 25 was like ... I am 35 and could not sit in the car for long ... even had some colleagues who are much younger try it and they couldn't believe anybody could stand it for long periods of time.

Good luck when your my age :lol:

Cheers, Jason.

[Goobz]

Does anyone know if they've made the colour screen available in the ute's yet? Maybe in the MKII's?

Thanks

Chris

[turb06]

BTW nyopa, that post was the biggest load of BS ive read ina long time. I dunno what scab assed site u pulled that from but I suggest trying another source of info.

Mate,

I see by you bio you are born in 1985 and currently 19 odd ... and by other posts been into car audio for four years ... how on earth do you have any idea what impact this sustained high outputs is having on your hearing ... when I was 19 I thought I new everything too!

I have a Lux Pack and went to see what 25 was like ... I am 35 and could not sit in the car for long ... even had some colleagues who are much younger try it and they couldn't believe anybody could stand it for long periods of time.

Good luck when your my age :lol:

Cheers, Jason.

I agree, I used to play all my music on full volume 100% of the time, now I have to have it louder than anyone else can stand just so I can hear it properly. Well that's what I am blaming it on anyway.

Dazza.

[NYOPA]

QUOTE (Trough Lolly @ Oct 19 2004, 11:53 PM)

BTW nyopa, that post was the biggest load of BS ive read ina long time. I dunno what scab assed site u pulled that from but I suggest trying another source of info.

Just to rebutt the critisciam of me above.

1. the info is the current figures released from the National Acoustic Laboritory (2002 I think). The premier acostical and noise institute in this country, they are also in step with the reasearch from nth America on this subject.

2. The SPL was measured with a B & K 4191 microphone and smarrt audio software. Which I calibrated before I tested.

3. Even if I had used a cheap "no name" SPL meter ie a radio shack thing, the figures wouldn't be out by more than + or- 1% especially when calibrated before hand.

4. Lastly I have been studying acoustics and vibration since before you were born Trough Lolly. I see you are interested in car acoustics and that's great. Keep reading and debating as I agree with you that the 155dB figure MS700 claims is very high.

However given that this may have been read on an SPL meter with the weighting off ( we don't know) and that on a quick glance it looks like the aussie record is around the 168b dB mark???.. then its certainly not impossible at all. lol... :lol: your brain would probably be rattling around in your head at that level.

If you would like any more info on acoustics etc please Pm me as calling my post a load of BS is quite insulting given my years of research and work in the field.

We all know everything at 19, now that I am 39 I realise that I really know nothing.

my 2 cents worth.

david

[turb06]

QUOTE (Trough Lolly @ Oct 19 2004, 11:53 PM)

BTW nyopa, that post was the biggest load of BS ive read ina long time. I dunno what scab assed site u pulled that from but I suggest trying another source of info.

Just to rebutt the critisciam of me above.

1. the info is the current figures released from the National Acoustic Laboritory (2002 I think). The premier acostical and noise institute in this country, they are also in step with the reasearch from nth America on this subject.

2. The SPL was measured with a B & K 4191 microphone and smarrt audio software. Which I calibrated before I tested.

3. Even if I had used a cheap "no name" SPL meter ie a radio shack thing, the figures wouldn't be out by more than + or- 1% especially when calibrated before hand.

4. Lastly I have been studying acoustics and vibration since before you were born Trough Lolly. I see you are interested in car acoustics and that's great. Keep reading and debating as I agree with you that the 155dB figure MS700 claims is very high.

However given that this may have been read on an SPL meter with the weighting off ( we don't know) and that on a quick glance it looks like the aussie record is around the 168b dB mark???.. then its certainly not impossible at all. lol... :lol: your brain would probably be rattling around in your head at that level.

If you would like any more info on acoustics etc please Pm me as calling my post a load of BS is quite insulting given my years of research and work in the field.

We all know everything at 19, now that I am 39 I realise that I really know nothing.

my 2 cents worth.

david

Would the diference in getting a sound system from 155db to 168db be an enormous amount of money? Kind of like getting a car from 12sec to 10sec.

Dazza.

[NYOPA]

Quote richard_mmmm Posted on Oct 19 2004, 07:16 PM

NYOPA, what you should also add is that; for every 3db increase the actual "loudness" doubles (sounds twice as loud). 

Absolutley right richard, thanks I should have mentioned it

Think of it as a lady standing on your foot with a stilleto heel. Or in our case level hitting your ear drum. (NB, not pressure measured in Pa as this doubles every 6dB SPL)

if you add 3dB to her she doubles in size, add another 3db she doubles again. Shes gone from a shapely 60kg beauty to a 240Kg heffer (in 6dB)on the same heel.. and your squealling like a banshee! pray nobody adds another 3dB to her.

cheers

david

[CHIPS]

Quote richard_mmmm Posted on Oct 19 2004, 07:16 PM

NYOPA, what you should also add is that; for every 3db increase the actual "loudness" doubles (sounds twice as loud). 

Absolutley right richard, thanks I should have mentioned it

Think of it as a lady standing on your foot with a stilleto heel. Or in our case level hitting your ear drum. (NB, not pressure measured in Pa as this doubles every 6dB SPL)

if you add 3dB to her she doubles in size, add another 3db she doubles again. Shes gone from a shapely 60kg beauty to a 240Kg heffer (in 6dB)on the same heel.. and your squealling like a banshee! pray nobody adds another 3dB to her.

cheers

david

Great posting NYOPA!

.........Interesting reading!

Mark.

[NYOPA]

Hi turb06

I am not sure about the $$ involved in making the system louder, however a simple bunch of figures can probably be transfered or at least give you an idea of how much power is required. keep in mind these figures don't take into consideration any real world factors (speaker efficiency, number of speakers, porting etc) thus are only guesstamites. However it will give you an idea of the representation

If we have a "perfect speaker" and at 1 Watt/m^2 it produces 120dB

therefore to produce 155dB we would need 3000 W/m^2

so to produce 168dB we would need around 60,000 W/m^2

LOL... you tell me how much more that would cost? :lol:

cheers

david