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.
The Mosquito into a mobile phone ringtone, which could not be heard by teachers if the phone rang during a class. Mobile phone speakers are capable of producing frequencies above 20 kHz. This ringtone became informally known as "Teen Buzz" or "the Mosquito ringtone" and has since been sold commercially. The Mosquito won the Ig Nobel for Peace in 2006. The Ig Nobels celebrate the quirkier side of serious scientific endeavour, honouring "achievements that first make people laugh, and then make them think". The German Federal Institute for Occupational Safety and Health stated in a report on The Mosquito, entitled ""Use of