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.
Two-tone siren of the French Gendarmerie. Doppler-Fizeau effect of a passage from left to right, made by computer. No engine noise, it's up to you to choose the noise of your vehicle according to your project. UCS Category: VEHSirn. Duration: 00:20.
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.
Sound recording in the passenger compartment of a car during a short journey on a road limited to 90 km/h. It is a Citroën C3 petrol. UCS Category: VEHInt. Duration: 03:13.
Small brook, blackbird, fly, birds, 2 different sounds of the brook (on the left, a deeper "meander" and on the right another shallower one, so I put myself in the middle!). Forest of Signy-l'Abbaye (Ardennes). UCS Category: AMBForst. Duration: 05:00.
Siren of a large French Civil Security truck. Sound recording during the open day of the UIISCI in Nogent-le-Rotrou in France. UCS Category: VEHSirn. Duration: 02:05.
