13idnyk

Sound Pressure Level

The new TL reads how much pressure your system makes and then converts it into decibles? Is it capable of telling you the PSI of your system?
How much PSI = 1dB?

Haunz

iTrader: (3)

1db = .02 micro-pascals

conversion tells me thats about 2.9x10^-12 PSI

The A Team

iTrader: (1)

^^ WOW!! [img]graemlins/bow.gif[/img]

seege

iTrader: (1)

I don't think so. Decibels are logarithmic so 140 is 10 times the pressure as 130, 130 is 10 times the pressure of 120 and so on.
180 dB is approximately 2 atm's of pressure at the node and 0 atm at the antinode.

Rip Rock

Here is a chart ......


SPL = 20 Log(p/p ref)
p = pressure in pascals
p ref = reference pressure in pascals = 2 x 10^-5 Pa (pascals)
to convert psi to pascals you need this:
Pa/psi (approximately)
so take your relative PSI value convert it to pascals and dump it back
into the above formula.
2 psi = 13638 Pa
SPL = 20 Log [13638/(2x10^-5)] = 176.7 dB acoustical
More dB SPL versus PSI
dB
acoustical - PSI
50.7 - 0.000001
56.7 - 0.000002
60.2 - 0.000003
62.7 - 0.000004
64.6 - 0.000005
66.2 - 0.000006
67.6 - 0.000007
68.7 - 0.000008
69.7 - 0.000009
70.7 - 0.00001
76.7 - 0.00002
80.2 - 0.00003
82.7 - 0.00004
84.6 - 0.00005
86.2 - 0.00006
87.6 - 0.00007
88.7 - 0.00008
89.7 - 0.00009
90.7 - 0.0001
96.7 - 0.0002
100.2 - 0.0003
102.7 - 0.0004
104.6 - 0.0005
106.2 - 0.0006
107.6 - 0.0007
108.7 - 0.0008
109.7 - 0.0009
110.7 - 0.001
116.7 - 0.002
120.2 - 0.003
122.7 - 0.004
124.6 - 0.005
126.2 - 0.006
127.6 - 0.007
128.7 - 0.008
129.7 - 0.009
130.7 - 0.01
136.7 - 0.02
140.2 - 0.03
142.7 - 0.04
144.6 - 0.05
146.2 - 0.06
147.6 - 0.07
148.7 - 0.08
149.7 - 0.09
150.7 - 0.1
156.7 - 0.2
160.2 - 0.3
162.7 - 0.4
164.6 - 0.5
166.2 - 0.6
167.6 - 0.7
168.7 - 0.8
169.7 - 0.9
170.7 - 1.0
171.5 - 1.1
172.2 - 1.2
172.9 - 1.3
173.6 - 1.4
174.2 - 1.5
174.7 - 1.6
175.3 - 1.7
175.8 - 1.8
176.2 - 1.9
176.7 - 2.0
180.2 - 3.0
182.7 - 4.0
184.6 - 5.0
186.2 - 6.0
187.6 - 7.0
188.7 - 8.0
189.7 - 9.0
190.7 - 10.0
191.5 - 11.0
192.2 - 12.0
192.9 - 13.0
193.6 - 14.0
194.2 - 15.0
194.7 - 16.0
195.3 - 17.0
195.8 - 18.0
196.2 - 19.0
196.7 - 20.0
197.1 - 21.0
197.5 - 22.0
197.9 - 23.0
198.3 - 24.0
198.6 - 25.0
199.0 - 26.0
199.3 - 27.0
199.6 - 28.0
199.9 - 29.0
200.2 - 30.0

[ March 03, 2005, 10:39 PM: Message edited by: Rip Rock ]

13idnyk

Oh man. I got myself in deep with that one!
Thanks for the info!

Livin - Loud

LOL.. that's aweomse riprock!

Livin loud

Haunz

iTrader: (3)

He asked for PSI at 1db... I assumed everyone could take reference from there...

Edit: you need interferance for nodes to occur...

[ March 04, 2005, 01:47 AM: Message edited by: Haunz ]