(High-pitched sounds) (High-pitched sounds) (Hooting) MB: So what he's doing is he's changing the shape and the length of the vibrating air column using rhythmic contractions of all the muscles to generate all those sounds that you're hearing.
(Sonidos agudos) (Sonidos agudos) (Ululato) MB: Ahora está cambiando la forma y la longitud de la columna de aire mediante contracciones rítmicas  de todos los músculos para generar todos esos sonidos que están escuchando.