Anyone got a noise meter in Auckland/Northland area?

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Mark

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#159938 17-Dec-2014 20:44

I don't suppose anyone has a noise meter they could measure the output of my bike with?

I want to go on a track day and before I hand over cash I need to check my bikes within limits.

Thanks!

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#1199517 17-Dec-2014 20:49

whats the limit for the track day?

gzt

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#1199521 17-Dec-2014 21:01

There are several phone apps. For iphone with only standard models the software pre-calibration will be mostly ok. For others don't know what the approach is. What phone/pad do you have?

Jase2985

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#1199525 17-Dec-2014 21:19

http://hyperphysics.phy-astr.gsu.edu/hbase/acoustic/isprob2.html

thats a good site

from what i remember most tracks are 85dB at the perimeter

TLD

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#1199526 17-Dec-2014 21:20

Mark: I don't suppose anyone has a noise meter they could measure the output of my bike with?

I want to go on a track day and before I hand over cash I need to check my bikes within limits.

Thanks!

Throw a really loud party so your neighbour reports you to noise control, and when they come visit, ask them to test your bike.

Find out where your nearest noise control base is, and pop round and offer them a drink.

Hire a sound level meter via Yellow Pages

http://accurate.kiwi/sound/soundlevel.htm?gclid=CJatnqPSzMICFQoAvAodTTAA_w

Trevor Dennis
Rapaura (near Blenheim)

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#1199562 17-Dec-2014 22:46

iphone, in fact any smartphone?

Mark

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#1200228 18-Dec-2014 22:07

Can a phone really do a decent job at measuring sound ?

Track day has a 95db limit, just not sure what distance they measure from will have to go look it up.

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#1200233 18-Dec-2014 22:24

http://blogs.cdc.gov/niosh-science-blog/2014/04/09/sound-apps/

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#1200235 18-Dec-2014 22:27

http://blog.faberacoustical.com/2010/ios/iphone/iphone-4-audio-and-frequency-response-limitations/

TLD

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#1200254 18-Dec-2014 23:03

Mark: Can a phone really do a decent job at measuring sound ?

Track day has a 95db limit, just not sure what distance they measure from will have to go look it up.

ISTR that the distance is one meter from the end of the exhaust pipe, but that was in the UK. If you install a phone app or two, I guess it would be an idea to take it with you to compare and calibrate against the track's meter.

I wonder if the organisers would have any advice? They might say such and such an app should do the job. Does your bike have an aftermarket exhaust?

Trevor Dennis
Rapaura (near Blenheim)

TLD

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#1200255 18-Dec-2014 23:03

Mark: Can a phone really do a decent job at measuring sound ?

Track day has a 95db limit, just not sure what distance they measure from will have to go look it up.

Trevor Dennis
Rapaura (near Blenheim)

Jase2985

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#1200280 19-Dec-2014 06:02

Mark: Can a phone really do a decent job at measuring sound ?

Track day has a 95db limit, just not sure what distance they measure from will have to go look it up.

the noise testing for LVVTA is 1m from the exhaust at a 45 degree angle, the limits are on their website. but these are different to the tracks

im pretty sure they measured it from the perimeter/boundary fence

what track is it?

TLD

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#1200315 19-Dec-2014 08:45

[SNIP]

im pretty sure they measured it from the perimeter/boundary fence

what track is it?

I was thinking 95db would be hard to stay under from one metre. I could pass wind louder than that.

Trevor Dennis
Rapaura (near Blenheim)

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#1200385 19-Dec-2014 09:51

Cool

Mark

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#1200580 19-Dec-2014 14:17

It's Pukekohe, Pro Rider are doing a Track Day in february .. I'll try my phone and see if it's any good, I do have an after market pipe an the bike is not that quiet even when stock.

Mark

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#1200582 19-Dec-2014 14:19

It's Pukekohe, Pro Rider are doing a Track Day in february .. I'll try my phone and see if it's any good, I do have an after market pipe an the bike is not that quiet even when stock.

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