Several beeps of an active sonar. This is a low frequency sonar (long range but low definition). It is a triangular wave of 1030 Hz frequency easy to put in loop. In reality, a military submarine usually has passive sonar, more sonar info: en.wikipedia.org/wiki/Sonar. UCS Category: BOATSub. Duration: 00:31.
Sound atmosphere of a cave. Created on computer, with sounds from LaSonotheque: Rain, drops of water and reverberation. Easy to loop. UCS Category: AMBUndr. Duration: 01:11.
This sound is the original. On October 4, 1957, the first artificial satellite took off: Sputnik 1. With its 83 kilos and 58 cm in diameter, it will revolve around the Earth in an elliptical orbit, between 288 and 947 kilometers in altitude. , emitting this characteristic "beep beep" broadcast by all the radios in the world. UCS Category: COMTran. Duration: 00:11.
Sound of a small electric drill on battery. It is equipped with a concrete bit, and drills concrete. Two drill strokes each followed by a removal of the bit, then the machine is turned off. UCS Category: TOOLPowr. Duration: 00:41.