Assignment 8: Calculating Total Absorption 1. Based on the geometric measurements provided and the acoustical data measured, calculate the total absorption in this room in each octave band. (Hint

For the assignment this coming week, you don't have to do #2. It has ended up being a bit too much work, and #1 will keep you busy enough. 

To find the total absorption for the #1, you'll be using a different method than you have in the past assignments. In this case, we know the T60, since I measured it. Since the Sabine equation relates T60 to volume and total absorption, you can find the total absorption directly if you know the T60 and volume. 

The Sabine equation normally looks like this: T60=0.16(V/A)

However, this is also true: A = 0.16(V/T60) 

So your first task is to find the volume of the space. This will take some work. You can divide the floor area into rectangles and triangles, find their areas, and then add them together to find the total. Then, to find the volume, multiply the floor area by the height of the room. You can just average the height from the front to the back. 

After you have the overall volume, find the volume of the balcony and subtract it out. 

For T60 values, use the ones I measured. You can pick one of the measurements (balloon, sweep, etc.)