On the most basic level it would seem that noise levels would double with doubling the number of birds (1->2, 2->4, etc). However, if we measure noise not only as a function of amplitude but also as a function of time (how much of the day is occupied by bird noise vs. how much quiet time you can get) then we might realize that things are more complex.
I could see things going two ways and would like to hear from people of their experience with this. I am sure this depends on parrot type and species too.
On the most basic level it would seem that an increase in birds would reduce the amount of quiet time. If 1 bird makes 2 hours of noise per day, then 2 birds make 4 hours. To make things worse, I can picture that adding another bird could rouse up the other birds to be noisy more of the time. Let's say going from 2 birds to 3 birds. When the first bird decides to get noisy, 2 and 3 join in. Then after things quiet down, bird 2 gets noisy and 1 and 3 join in, etc.
On the other hand I could see the flip side being possible too. All the birds get their noisiness out all at the same time and get it over with and then all quiet together. In that case you might have to deal with a great volume for the same duration as with a single bird and then get peace and quiet the rest of the day.
So how is it in reality and I wonder if it's a different pattern for different species.







