Conference_programme: 1: Absorbing materials
Lecture: The negative coefficient of Bruel & Kjaer green paint
Author(s): Cooper Steven
Summary:
The typical expression of the absorption of blockwork can describe plain blockwork and painted blockwork. For certification of a reverberation room the reverberation times were obtained during the construction phase. As expected painting the blockwork increased the reverberation time. The application of multiple layers of a green paint identical to Bruel & Kjaer's green colour was subject to testing. Technically this acoustic treatment must be a negative absorption coefficient although such an expression would not normally be used. When applying the standard calculations for absorption is there a difference in the absorption coefficients?
Corresponding author
Name: Mr Steven Cooper
e-mail: drnoise@acoustics.com.au
Country: Australia
