Beeps an electrocardiogram during cardiac arrest. This sound was made on computer. It is a square wave of frequency 475 Hz. UCS Category: BEEPMed. Duration: 00:23.
The note "G", on the metallophone, when counting down the time as in the 1000 euros game on France Inter, formerly "thousand francs game". I wrote an article about this sound, on the blog. UCS Category: MUSCChim. Duration: 01:00.
I pick up the receiver of the last telephone box still in operation in metropolitan France. It is in Murbach (68). UCS Category: COMTelph. Duration: 00:01.
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.