Quote:
JimP wrote:
 I wonder if this is background noise in the electronics?
What happens if you go lower with the SPL? does it scatter more? |
I suppose I ought to try it to find out.
At these very low frequencies perhaps atmospheric pressure plays a part in the signal to noise ratio?
It is also quite windy here today and the windows are open "on the catch" for ventilation. The IB enclosure is not airtight either.
This may all help to explain the increased scattering below 10Hz with lower SPLs.
I thought it fascinating how the bundle of curves tightens with increased signal.