- #1
soupybionics
- 5
- 0
Hi,
I am just trying to understand the output of a sound spectrum analyzer. There are three dimensions
1) Time
2) Frequency
3) Volume (db)
I am confused about few things here:
1) How should I perceive the volume dimension here?
2) Why are the db values negative here and w.r.t what reference value are they negative? The standard equation for the volume (sound) is 20(log(value/refvalue) to base 10), right?
3) Also I don't really understand the reason behind multiplying the log output with 20 here. What does it signify?
I have attached the spectrum analyzer output.
Thanks in advance!
I am just trying to understand the output of a sound spectrum analyzer. There are three dimensions
1) Time
2) Frequency
3) Volume (db)
I am confused about few things here:
1) How should I perceive the volume dimension here?
2) Why are the db values negative here and w.r.t what reference value are they negative? The standard equation for the volume (sound) is 20(log(value/refvalue) to base 10), right?
3) Also I don't really understand the reason behind multiplying the log output with 20 here. What does it signify?
I have attached the spectrum analyzer output.
Thanks in advance!