Telephone tone when searching a correspondent. This is a sound wave frequency of 440 Hz sinusoidal. This sound is easy to loop. UCS Category: COMTelph. Duration: 00:01.
Cries of a little bat found on the ground :'( Bats use ultrasound to move and hunt, but they also shout in some cases. UCS Category: ANMLBat. Duration: 00:13.
Telephone tone when the phone rings, in the UK, Ireland, New Zealand and many other countries with historical ties to the Commonwealth. These are two sound waves of frequencies 400 Hz and 450 Hz sinusoidal. This sound is easy to loop. UCS Category: COMTelph. Duration: 00:30.
Two helicopters landing and taking off one after the other. Sound recording during the open day of the UIISCI in Nogent-le-Rotrou in France. UCS Category: AEROHeli. Duration: 02:52.
Lower deck in front of a boat. This is the ferry between Royan and the Pointe de Grave. Near Bordeaux, France. UCS Category: BOATShip. Duration: 01:45.