Derisive cries from the audience
I believe the answer is:
hoots
(Other definitions for hoots that I've seen before include "cries of derision" , "Roars with laughter" , "Owl calls" , "Sounds of the owl" , "Owl noises" .)
I believe the answer is:
hoots
(Other definitions for hoots that I've seen before include "cries of derision" , "Roars with laughter" , "Owl calls" , "Sounds of the owl" , "Owl noises" .)