15th January 2012

#

**241**Quote:

Jens I absolutely understand.

The question throughout here is one of level. I can't see one layer of plasterboard 2 Metres away as 'High gain'

You are good with Arithmetic and such.

How about you calculate the combined level of the 3 reflections caused by equidistance from floor, wall, wall.

Then calculate the level of the next loudest reflection, from a wall 3 Metres away. Diminish it's reflectivity slightly due to the plasterboard and insulation layer.

Lets see how they stack up.

In Noise Control measurement, the guideline is to ignore any factor 10dB lower than the others as it will not contribute significantly to the log sum.

I have an open mind here. If you wish to convince me of the power of all these far away and/or weakly reflective boundaries, do it by numbers.

Without that we are both guessing aren't we?

DD

The question throughout here is one of level. I can't see one layer of plasterboard 2 Metres away as 'High gain'

You are good with Arithmetic and such.

How about you calculate the combined level of the 3 reflections caused by equidistance from floor, wall, wall.

Then calculate the level of the next loudest reflection, from a wall 3 Metres away. Diminish it's reflectivity slightly due to the plasterboard and insulation layer.

Lets see how they stack up.

In Noise Control measurement, the guideline is to ignore any factor 10dB lower than the others as it will not contribute significantly to the log sum.

I have an open mind here. If you wish to convince me of the power of all these far away and/or weakly reflective boundaries, do it by numbers.

Without that we are both guessing aren't we?

DD