Hearing range 60 decibels, the hearing range for the Senegal bushbaby is 92 Hz–65 kHz, and 67 Hz–58 kHz for the ring-tailed lemur. Of 19 primates tested, the Japanese macaque had the widest range, 28 Hz–34.5 kHz, compared with 31 Hz–17.6 kHz for humans. Cats have excellent hearing and can detect an extremely broad range of frequencies. They can hear higher-pitched sounds than humans or most dogs, detecting frequencies from 55 Hz up to 79 kHz. Cats do not use this ability to hear ultrasound for communication but it is probably important in hunting, since many species of rodents make ultrasonic calls.
Ghosts (Monolake album) Ghosts (Monolake album) Ghosts is the seventh album from German techno music producer, Monolake (also known as Robert Henke). It is the second part of what is claimed to be a trilogy of three albums, that began with Monolake's sixth album, "Silence." Although the album follows a primarily techno aesthetic, it also incorporates elements of drum n' bass, dubstep, and ambient music. Some of the sounds of this album are notable in that they were created by sampling recordings that included frequencies outside of the range of human hearing (above 20 kHz), and then transposed down into the audible range.