T
The_12NV
- Jan 1, 1970
- 0
Hi there ppl, Im after a SPL meter that can read up to 180DB. If there is a
schematic available with parts, please post me. cheers
schematic available with parts, please post me. cheers
The_12NV said:Hi there ppl, Im after a SPL meter that can read up to 180DB. If there is a
schematic available with parts, please post me. cheers
Sorry, can't hear you180dB????
What the proverbial are you measuring? a nuclear explosion at 4 meters or
something?
Hi there ppl, Im after a SPL meter that can read up to 180DB. If there is a
schematic available with parts, please post me. cheers
The_12NV said:Hi there ppl, Im after a SPL meter that can read up to 180DB. If there is a
schematic available with parts, please post me. cheers
Well Actually, im in the car audio show and, at present the record is
175.3DB and im currently 173.4DB.
So now u can understand why i need 180DB.
So anyone know where i could find ANY schematic of a SPL meter?
The_12NV said:Well Actually, im in the car audio show and, at present the record is
175.3DB and im currently 173.4DB.
So now u can understand why i need 180DB.
So anyone know where i could find ANY schematic of a SPL meter?
is
Phil Allison said:"The_12NV" <
** How are these levels being measured now ?
** Nope.
** I have posted a simple solution - time for you to reply and prove
you are not a troll.
............. Phil
whats the limit of air?
what happens when rarefactions get close to a total vacuum?
I've always wanted to know - Who is the idiot who gets to get inside the
car(s) and takes the readings?
BTW, is there anyone who knows of a commercially available microphone that
can handle a SPL of 180dB?
validity of the measurements.
Alan Rutlidge said:BTW, is there anyone who knows of a commercially available microphone that
can handle a SPL of 180dB? Which then brings into question the accuracy and
validity of the measurements. If the contest is all about loudness, your
own measurements would need to be taken with the same brand and model of SPL
meter (using the same settings) and under the exact same conditions for the
measurement to be valid and of useful comparison. It could be reasonably
argued a home built and uncalibrated meter will give a less than accurate
indication of the true SPL developed within the car.
Cheers,
Alan
BTW, is there anyone who knows of a commercially available microphone that
can handle a SPL of 180dB? Which then brings into question the accuracy and
validity of the measurements. If the contest is all about loudness, your
own measurements would need to be taken with the same brand and model of SPL
meter (using the same settings) and under the exact same conditions for the
measurement to be valid and of useful comparison. It could be reasonably
argued a home built and uncalibrated meter will give a less than accurate
indication of the true SPL developed within the car.
Cheers,
Alan
Newsy said:Just found this:
http://www.realcaraudio.com/forums/showthread/t-996.html
The X-Meter by Terrasonde www.terrasonde.com, but I can't find the unit on
their site.
Phil Allison said:** You can use a standard SPL meter to measure any sound level possible -
all you do is calibrate the path loss at a distance.
If the SPL is say 120 dB at the point of interest with some test sound
and drops to 70 dB at a point some distance away then you have 50 dB path
loss.
If you read 130 dB SPL at that distant spot then the SPL at the
original one must be 180 dB SPL.
Get the idea ????
The_12NV said:Hi there ppl, Im after a SPL meter that can read up to 180DB. If there is a
schematic available with parts, please post me. cheers
The car becomes a "sealed chamber" to contain and maximize the SPL.
And yes, they sit on the 3 inch thick lexan wind screens to hold them
in place during the "run" which only lasts a few seconds and is a
burst of a single fairly low frequency "tone".
If you were using a mechanical "attenuator", it would be close to
impossible to reasonably accurately calibrate it due to all the
non-linearity that exists at these levels. I would even question the
ability of the event sponsors to accurately measure anything.
The_12NV said:Hi there ppl, Im after a SPL meter that can read up to 180DB. If there is a
schematic available with parts, please post me. cheers