Although this noise is louder than the blue whale call ... Both the male and female kakapo (Strigops habroptilus) use loud ...

A loud sound has a large amplitude, a high pitched sound has a high frequency. Musicians and scientists record and analyse sounds using wave traces. Sometimes you can see the source of the sound ...

"It's a very loud, high pitch sound that is very different than what we're used to with our normal sirens," said CCPD Officer Julian Esipitia. The sound varies from their typical sirens ...

There was a high-pitched, rasping Grade II apical ... was found to be Grade II at the base and less loud at the apex. The aortic second sound was louder than the pulmonic second sound.