Theyre called a "dB Meter".

The professional ones that are properly calibrated cost way too much to even think about.

I have a hand-held one that cost about $100 from Dick Smith Electronics... I use it to find the resonant frequency of car stereos used in SPL competitions..... but mine can only be used at low volumes. It only measures up to 130dB.

_________________
[NATHAN] -- Sold everything mini related and am back in big beautiful BMWs

i think mine is about 120db. LCB 2in and a stupid cannon. but the webber is stil louder

_________________
FOR SALE MInidlx, 1293, GR head, RE-13, GR worked Redline Manifold, 45 mm DCOE,pulsar dizzy , "S" Disc's, Mk II "S" box, 3.65 diff. Minator 10X6's On the loose

i think you need your heading checked mate

_________________

Supercharged 850 is a ICE nut: " you need your head checked mate "

_________________
Too many cars, and too little time.

"You need your headunit checked, mate"

It should be

Got told a trick by the inspectors at ViC roads when I worked their. Steel wool up the exhasut pipe doesn't restrict the airflow to much and cuts the nose down! You pass the test and it just burns out in a very short time! Haven't tried it but they seemed to know all the tricks!

Geez... I was just pointing out that I have a dB meter.... then said that it was bought for car audio applications.... then I said that it only went to 130dB maximum... which is not enough for my stereo. (I need something that measures up to 150dB or more to get a proper SPL reading, but the handheld can find resonant frequencies at ANY volume)

It IS good for measuring exhausts, and has been used for this purpose too.

_________________
[NATHAN] -- Sold everything mini related and am back in big beautiful BMWs