Well looks like the new mics r tough and on par with B&K mics. ~5dB down on the old termpro ones.
Oh yer 2 second need to reg a burp, and meant to be near on linear reading
Should be interesting
Image from TermproGraph of testing with 2 neew mics and the old one at diffrent freqs and in the same car, amps etc. Rileys Van if any wants to know that did 173.3dB @ 53hz I belive in SS5-8 at finals last year.
[ February 12, 2003, 19:23: Message edited by: KraSE ]
Andu
Feb 12 2003, 09:17 PM
and they need 2sec burps instead of 0.5sec looks like i'll have to ditch my 1sec burp track cd that I was so fond of
hardon
Feb 12 2003, 09:51 PM
yeah - an assessment of my system's wiring is required before i re-start cometing!
Andu
Feb 12 2003, 10:27 PM
So if CAAdB is getting the new mics then CAAdB will have lower scores then the dB-Drags... we can do our own mic comparisons soon enough
adcola64
Feb 12 2003, 10:59 PM
Walkinshaw
Feb 12 2003, 11:45 PM
good, no more inflated scores above 140db....
looking at the diffrences in score between old and new. Looks as if ANDU is back into the mid 140's club
Marc
Feb 13 2003, 12:11 AM
These are the microphones we have.
NUTTTR
Feb 13 2003, 12:12 AM
lol, andu in the mid 140's? ppppffffft, he'll move to QLD and use the mics in qld, it'll be louder for sure
Nah, in all seriousness it looks like a huge difference.... i gather the termpro mics are all calibrated, how can there be that much difference then?
QUOTE
Originally posted by ubugger:
lol, andu in the mid 140's? ppppffffft, he'll move to QLD and use the mics in qld, it'll be louder for sure
Nah, in all seriousness it looks like a huge difference.... i gather the termpro mics are all calibrated, how can there be that much difference then?
a lot harder mic. don't ask me to get technical maybe bassaholic can hehee.
They are on par with the B&K mic which is the world standard mic for dB measurments IIRC. If u hit over 170dB on that u really hit over 170dB. only last year i think did some1 hit 170+ or 2001 on a B&K.
hardon
Feb 13 2003, 02:13 AM
Is it a "sensitivity" factor like with drivers that make the mics more accurate??
Old meter - New meter
170 - 163.9
169 - 163.0
168 - 162.1
167 - 161.3
166 - 160.4
165 - 159.5
164 - 158.6
163 - 157.7
162 - 156.9
161 - 155.9
160 - 155.1
159 - 154.2
158 - 153.3
157 - 152.5
156 - 151.6
155 - 150.7
154 - 149.8
153 - 148.9
152 - 148.0
151 - 147.2
150 - 146.3
149 - 145.4
148 - 144.5
147 - 143.7
146 - 142.8
145 - 141.9
144 - 141.0
143 - 140.1
142 - 139.3
141 - 138.4
140 - 137.5
QUOTE
The "stock" sensors are manufactured for a maximum SPL of 180 dB. (A resistor value change on the sensor PCB will allow the unit to measure accurately to 200 dB.)
The sampling time for the system is 1 second. It should be pointed out that sampling takes place CONTINOUSLY during measurement. No data is dropped. However, for the purpose of calculating the current SPL, the program takes a "snapshot" of the sampled data every 1 second. Therefore, you should hold your note for a minimum of 2 seconds to guarantee that your system is playing for the entire 1 second snapshot. Theoretically, you should be able to only burp your system for 1 second and get a complete data set. However, since you don't know when the sample set begins, you must assume a worst-case scenario and play your tone for the entire 2 seconds.
Using a longer sampling time provides better frequency resolution for the meter. In our case, frequency resolution is 1 Hz.
With regards to sweeps... fast sweeps may result in results that are "smeared". In other words, you may not be able to determine where your maximum SPL occurs within 1 Hz. However, the dB Jams CD has sweeps that are 10 Hz wide over a 30 second interval. This provides approximately 3 seconds per Hz which is more than the 2 seconds required for a worst-case meter reading.
Wayne Harris
Also the lower scores can be partly due to the longer burps needed no longer 1/2 second burps.
Bassaholic
Feb 13 2003, 06:20 PM
QUOTE
Originally posted by hardon:
Is it a "sensitivity" factor like with drivers that make the mics more accurate??
Not really, as sensitivity has little to do with accuracy.. It just happened that although the termlab meters were farily consistent, they weren't actualy reading the same scores as a B&K mic (meant to be the most accurate mic)
QUOTE
Originally posted by Bassaholic:
quote:
Originally posted by hardon:
[b]Is it a "sensitivity" factor like with drivers that make the mics more accurate??
well closer to than most other mics
Andu
Feb 16 2003, 11:39 AM
QUOTE
Originally posted by Wayne Harris 14-02-2003:
We will be shipping 5 units on Monday. I expect to ship another 20 by Thursday. Another 25-50 will go out the following week and we should start getting caught up pretty soon after that. After the backorders are filled, the product will be available off-the-shelf.
And another 2 weeks for airmail. Will they be here in time for AutoExpo, I hope so
[ February 16, 2003, 09:41: Message edited by: Andu ]
Marc
Feb 16 2003, 07:07 PM
We are led to believe ours will arrive in the country mid this coming week. Will hopefully be held in customs no more than 4 days.
We will have it in time
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