Noise of a car driving on an asphalt road. It starts, accelerates, rolls, brakes and turns off the engine. Sound taken from the car. This is a Peugeot 107 petrol. Duration: 01:10.
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. Duration: 00:31.
Sound ambience of countryside at dawn, the moment when the birds begin to sing spring: we are on May 18, 2020 at 5.30 a.m. France, in full containment linked to COVID-19. Duration: 06:17.
Song of robin, a garden bird. He cries from a tree, spacing his songs for 2 to 3 seconds, then stops, changes his tree and starts again a few dozen times and so on around his territory. Duration: 00:02.
