Several beeps of an active sonar. This is a low frequency sonar (long range but low definition). It is a sine wave of 1040 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: 00:21.
Strong wind in a tree and a patch of jail. Noise needles of a pine tree, a bird cries, wind variable. Learn to imitate the sound of the wind www.libertivi.com/lelabodubruiteur_122. UCS Category: WIND. Duration: 01:18.
An electrocardiogram beep when the heart beats at 60 Hz Or 60 beats per minute. The resting heart rate is 60 to 80 beats per minute. Learn how to make the sound effects of a heartbeat: www.libertivi.com/lelabodubruiteur_100. UCS Category: BEEPMed. Duration: 00:09.
Singing a field cricket. Present in France, the field cricket digs a hole in the sunny plains and sings to seduce the female. UCS Category: ANMLInsc. Duration: 00:36.
Cinema projector (35mm, Kinoton, FP30) without fan or lamp: Start-up, rolling, 4 beeps then shutdown (Sound recording: In front of mechanism). UCS Category: COMAv. Duration: 00:37.
Very big modern train horn. It is a construction train, stationary (no Doppler-Fizeau effect). Sound recording at about 150 meters. UCS Category: TRNHorn. Duration: 00:06.