Ok iam going to try it again...
This is all the information I have:
L=10Log10(I/Io)
where: L= the loudness of sound measured in decibels (dB)
I= the sound intensity (in watts per square metre)
Io= the intensity of a reference sound. This is usually taken to be 10^-12 (in watts per square metre)
I also was given a table which has values for sound intensity (I) in watts/m^2 and source of sound. The information from the table is below:
Sound Intensity
10^-12.8, source of sound: inaudible to most humans
10^-12.6, source of sound: nothing is written here
10^-12.4, source of sound: nothing is written here
10^-12.2, source of sound: nothing is written here
10^-12, source of sound: Threshold of Hearing (Io)
10^-11.8, source of sound: nothing is written here
10^-11.6, source of sound: nothing is written here
10^-11.4, source of sound: very quite whisper
10^-11.2, source of sound: nothing is written here
10^-11, source of sound: rustle of leaves
Now from this information it wants me to complete a table with the headings I, I/Io and 10Log10(I/Io).
Iam thinking that "I" is just the values given in the table for Sound intensity
Then to work out I/Io, I need Io...which is I dont understand how to get...or really what it is...It is usually taken as 10^-12...but it cant be taken like that all the time especially for a sound that humans cannot hear.
hopefully my question makes more sense now.
tash