The shape of the whistle is made to look like the human throat, specifically the larynx, so that it can make a sound akin to a person screaming in a maximum state of fear. The sound was meant to ...

Known as the "Aztec death whistle," this object is an ancient Mesoamerican wind instrument typically crafted into the shape ...

Dogs are able to hear sounds with frequencies up to 60 kHz, while some species of bats can detect frequencies of 200 kHz. A dog training whistle makes sound waves that have a frequency of 40,000 Hz.