75 Free Signal Sound Effects - Most Popular
National Alert Signal
Fire Alarm: Communities #3
Alarme d'incendie que l'on retrouve généralement dans les collectivités (Lycées, collèges, centres, etc.). Same sound as #0268 and #2250, but longer. Difficult to loop. UCS Category: ALRMElec. Length: 00:40.
Pink Noise
Pink noise or 1/ƒ noise (sometimes also called flicker noise) is a signal or process with a frequency spectrum such that the power spectral density (energy or power per Hz) is inversely proportional to the frequency: https://en.wikipedia.org/wiki/Pink_noise. UCS Category: TEST. Length: 00:20.
Evacuation Alarm #1
Sound of the evacuation siren in a concert hall, triggered by an electrical issue. Each such sequence is normally interspersed with a message in French and English, urging people to leave the building, but I have removed it. UCS Category: ALRMElec. Length: 00:06.
Sonar #2
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: https://en.wikipedia.org/wiki/Sonar. UCS Category: BOATSub. Length: 00:21.
National Alert Signal, Rémalard (61)
Civil siren of the "national alert signal", recorded in Rémalard, in France, on the first Wednesday of October 2024, at 12. UCS Category: ALRMSirn. Length: 01:33.
Reverse beeping #1
Beep of a truck goes back. This sound was made on computer. It is a triangular wave of frequency 1200 Hz. UCS Category: BEEPVeh. Length: 00:12.
Electrocardiogram 60 Hz
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: https://www.libertivi.com/lelabodubruiteur_100. UCS Category: BEEPMed. Length: 00:10.
Cardiac arrest, electrocardiogram #1
Beeps an electrocardiogram during cardiac arrest. This sound was made on computer. It is a square wave of frequency 475 Hz. UCS Category: BEEPMed. Length: 00:24.
Evacuation Alarm #3
Sound of the evacuation siren in a concert hall, triggered by an electrical issue. I looped a very short passage. Each such sequence is normally interspersed with a message in French and English, urging people to leave the building, but I have removed it. UCS Category: ALRMElec. Length: 00:18.
Train Whistle, Foley #7
I blow into a locomotive-style train whistle. I added a bit of reverb to make it sound more realistic. My whistle: https://thmn.to/thoprod/511358?offid=1&affid=792. UCS Category: TRNHorn. Length: 00:04.
National alert signal, test
Civil siren of the "national alert signal", during tests on the first Wednesday of the month: 1 cycle of 5 periods (61 seconds).
This is a realistic montage made using this imperfect sound, so feel free to do the same to make your siren sound like what you have in mind: https://bigsoundbank.com/national-alert-signal-remalard-61-s3257.html. UCS Category: ALRMSirn. Length: 01:47.
Car turn signals #1
Noise from the electrical relay of the blinker of a car. This is a Peugeot 107. UCS Category: VEHCar. Length: 00:12.
Sonar #1
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: https://en.wikipedia.org/wiki/Sonar. UCS Category: BOATSub. Length: 00:32.
Gas fog horn #2
2 long shots of a gas fog horn like those used by supporters in stadiums, protesters, skippers.. UCS Category: HORNAir. Length: 00:04.
National alert signal, end
Civil siren of the "national alert signal" if the alert is over. 1 cycle of 30 seconds.
This is a realistic montage made using this imperfect sound, so feel free to do the same to make your siren sound like what you have in mind: https://bigsoundbank.com/national-alert-signal-remalard-61-s3257.html. UCS Category: ALRMSirn. Length: 01:19.
67 Hz electrocardiogram
Beep emitted by an electrocardiogram when the heart rate is 67 BPM (67 beats per minute). Resting heart rate is typically 60 to 80 beats per minute. Learn how to create a heartbeat sound effect: https://lasonotheque.org/dossiers/techniques-bruitage-f112.html#14. UCS Category: BEEPMed. Length: 00:10.
Reverse beeping #9
Beep of a truck backing out of a vehicle. Easy to loop. UCS Category: BEEPVeh. Length: 00:31.
Evacuation alarm #2
Sound of the evacuation siren in a concert hall, triggered by an electrical issue. Each such sequence is normally interspersed with a message in French and English, urging people to leave the building, but I have removed it. UCS Category: ALRMElec. Length: 00:06.
Sonar #3
Several beeps of an active sonar. This is a low frequency sonar (long range but low definition). It is a sine wave of 1190 Hz frequency easy to put in loop. In reality, a military submarine usually has passive sonar, more sonar info: https://en.wikipedia.org/wiki/Sonar. UCS Category: BOATSub. Length: 00:21.
Hiss of steam train #3
Whistle of a steam train. Recording in the town of Martel, France. UCS Category: TRNHorn. Length: 00:03.
Cardiac arrest, electrocardiogram #2
Beeps an electrocardiogram during cardiac arrest. This sound was made on computer. It is a square wave of frequency 835 Hz. UCS Category: BEEPMed. Length: 00:25.
SOS in international Morse code #1
Distress signal "SOS" in international Morse (sound) alphabet. the Morse is formed of "dit" and "dah" (of points and features). 1 "dah" equals 3 "dit". The spaces between the letters are equivalent to 1 "dah", except for the SOS, which must be sent as if it were a single letter, that is to say not using an inter-letter interval. Ends with a space between the words equivalent to 7 "dit". Realized on a computer with a sine wave of 440 Hz. For more information on Morse: https://en.wikipedia.org/wiki/Morse_code. UCS Category: COMTelm. Length: 00:03.
Fire alarm: communities #1
Fire alarm that typically found in communities (high schools, colleges, centers, etc.). UCS Category: ALRMElec. Length: 00:02.
Car turn signals #5
Sound of car turn signals. Easy to loop endlessly. It is a Citroën C3. UCS Category: VEHCar. Length: 00:05.
Train whistle, foley #2
I blow into a locomotive-style train whistle. I added a bit of reverb to make it sound more realistic. My whistle: https://thmn.to/thoprod/511358?offid=1&affid=792. UCS Category: TRNHorn. Length: 00:05.
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