Alarm Horn Sounds

Unlike mechanical sirens, pneumatic alarm sirens can create a two-tone sound. Pneumatic sirens with horns are typically used on ships. The bigger the ship, the lower the sound of the horn. The Sounddogs Archive features some very nice recordings of ship horn sounds and pneumatic sirens. Below you will find an impressive example of a big ship's signal horn.

Alarm Horn Siren Sounds

Pneumatic alarm sirens can create enormous sound pressure and spread it across big distances thanks to the horns mounted on the top of the siren. The construction of pneumatic alarm sirens is different from mechanical sirens. While the mechanical siren creates the airstream with the help of centrifugal forces, the pneumatic alarm siren uses a compressed air canister to pump the airstream into the siren head.

Alarm Horn Siren

The air-powered alarm siren (pneumatic siren) is easily identified by the horns mounted to the siren's head. Similar to a mechanical siren, the air-powered alarm sirens create their signal by interrupting the air-stream cycle with the help of a perforated disc. The spinning disc inside the siren's head is called a rotor; it is electrically powered. The air-stream is directed through the holes in the rotor and external vents. The spinning motion of the rotor either opens or closes the holes, which creates the sound of the siren that is then directed to several horns. The air-stream that is needed for the operation of the siren is created by an Aerosol canister underneath the siren.

The main benefit of this type of siren is the extremely high sound level it creates. Pneumatic sirens can reach a sound pressure level of 130db (!) at a distance of 20 meters. The other benefit is the use of pressurised air. With the help of compressed air from a tank, these sirens can create a very high sound level almost immediately, which is very important for the proper operation of a siren. Pneumatic sirens also need less electrical power than mechanical sirens (but they do require more maintenance).
Many of these high-performance sirens were de-installed after the Cold War because they were no longer used. You can still see the pylons that those big old sirens used to be attached to (although nowadays they are more likely to house a mobile antenna than a siren).

Two-tone Horns Sounds

Unlike mechanical sirens, pneumatic alarm sirens can create a two-tone sound. Pneumatic sirens with horns are typically used on ships. The bigger the ship, the lower the sound of the horn. The Sounddogs Archive features some very nice recordings of ship horn sounds and pneumatic sirens. Below you will find an impressive example of a big ship's signal horn.

Library Waveform Filename add Description info Channels Duration ShortID Category Subcategory
1 Sounddogs Sound Library Horn,GrandAm,Honk,Med,Stati.wav Alarm, Horn: Horn GrandAm Honk Medium Static
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2.0 0:01

Alarm

Alarm Horn

2 Sounddogs Sound Library Horn,Party,Metal,Blow,Long.wav Alarm, Horn: Horn Party Metal Blow Long
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2.0 0:01Alarm Alarm Horn
3 Sounddogs Sound Library Horn,Boat,1,Long,3,Short,Ec.wav Alarm, Horn: Horn Boat 1 Long 3 Short Echo
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1.0 0:16Alarm Alarm Horn
4 Sounddogs Sound Library Horn,Steam Boat,Mid,Lazy,Re.wav Alarm, Horn: Horn Steam Boat Mid Lazy Reverb
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1.0 0:05Alarm Alarm Horn
5 Sounddogs Sound Library Horn,Boat,Tug,5,Short,Even.wav Alarm, Horn: Horn Boat Tug 5 Short Even
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2.0 0:17Alarm Alarm Horn
6 Sounddogs Sound Library Horn,Boat,Steam,3,Raspy,BG.wav Alarm, Horn: Horn Boat Steam 3 Raspy BG
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2.0 0:06Alarm Alarm Horn
7 Sounddogs Sound Library Horn,Truck,Doppler,Long,Awa.wav Alarm, Horn: Horn Truck Doppler Long Away
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1.0 0:06Alarm Alarm Horn
8 Sounddogs Sound Library Horn,Doppler,Honking By,Hap.wav Alarm, Horn: Horn Doppler Honking By Happy
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2.0 0:17Alarm Alarm Horn
9 Sounddogs Sound Library Horn,Party,Blow,Single,Long.wav Alarm, Horn: Horn Party Blow Single Long
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2.0 0:01Alarm Alarm Horn
10 Sounddogs Sound Library Horn,Squeak,Rubber Duck,Qua.wav Alarm, Horn: Horn Squeak Rubber Duck Quack
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2.0 0:01Alarm Alarm Horn
11 Sounddogs Sound Library Horn,Boat,2,Fast,1,Slow,Ech.wav Alarm, Horn: Horn Boat 2 Fast 1 Slow Echo
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1.0 0:07Alarm Alarm Horn
12 Sounddogs Sound Library Horn,Toot,Honk,Low.wav Alarm, Horn: Horn Toot Honk Low
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2.0 0:01Alarm Alarm Horn
13 Sounddogs Sound Library Horn,Doppler,By,GrandAm,Too.wav Alarm, Horn: Horn Doppler By GrandAm Toots
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2.0 0:26Alarm Alarm Horn
14 Sounddogs Sound Library Horn,Harley,Honk,Many,Pisse.wav Alarm, Horn: Horn Harley Honk Many Pissed
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2.0 0:06Alarm Alarm Horn
15 Sounddogs Sound Library Horn,Shaman,Hoots,Buzz.wav Alarm, Horn: Horn Shaman Hoots Buzz
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2.0 0:03Alarm Alarm Horn
16 Sounddogs Sound Library Horn,Party,Blow,Up Down,Lon.wav Alarm, Horn: Horn Party Blow Up Down Long
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2.0 0:01Alarm Alarm Horn
17 Sounddogs Sound Library Horn,Blast,NBA,Time Out,Cro.wav Alarm, Horn: Horn Blast NBA Time Out Crowd
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2.0 0:03Alarm Alarm Horn
18 Sounddogs Sound Library Horn,Squeaks,Rubber Duck.wav Alarm, Horn: Horn Squeaks Rubber Duck
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2.0 0:01Alarm Alarm Horn
19 Sounddogs Sound Library Horn,Boat,Tug,2,Airy.wav Alarm, Horn: Horn Boat Tug 2 Airy
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2.0 0:13Alarm Alarm Horn
20 Sounddogs Sound Library Horn,GrandAm,2 Honks,Static.wav Alarm, Horn: Horn GrandAm 2 Honks Static
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2.0 0:01Alarm Alarm Horn
21 Sounddogs Sound Library Horn,Harley,Honk,Twice,Med.wav Alarm, Horn: Horn Harley Honk Twice Med
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2.0 0:01Alarm Alarm Horn
22 Sounddogs Sound Library Horn,Squeak,Rubber Duck,Hig.wav Alarm, Horn: Horn Squeak Rubber Duck High
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2.0 0:01Alarm Alarm Horn
23 Sounddogs Sound Library Horn,Boat,3,Short,Even,Echo.wav Alarm, Horn: Horn Boat 3 Short Even Echo
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1.0 0:06Alarm Alarm Horn
24 Sounddogs Sound Library Horn,Toots,Honks,2,Low.wav Alarm, Horn: Horn Toots Honks 2 Low
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2.0 0:01Alarm Alarm Horn
25 Sounddogs Sound Library Horn,Doppler,Grand,Honk By.wav Alarm, Horn: Horn Doppler Grand Honk By
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2.0 0:23Alarm Alarm Horn
26 Sounddogs Sound Library Horn,Doppler,By,GrandAm,Lon.wav Alarm, Horn: Horn Doppler By GrandAm Long
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2.0 0:24Alarm Alarm Horn
27 Sounddogs Sound Library Horn,Harley,By,Fast,Annoyin.wav Alarm, Horn: Horn Harley By Fast Annoying
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2.0 0:09Alarm Alarm Horn
28 Sounddogs Sound Library Horn,Party,Metal,Blows,2.wav Alarm, Horn: Horn Party Metal Blows 2
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2.0 0:01Alarm Alarm Horn
29 Sounddogs Sound Library Horn,Boat,1,Short,1,Huge,De.wav Alarm, Horn: Horn Boat 1 Short 1 Huge Deep
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1.0 0:05Alarm Alarm Horn
30 Sounddogs Sound Library Horn,Toot,Honk,High.wav Alarm, Horn: Horn Toot Honk High
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2.0 0:01Alarm Alarm Horn
31 BBC Sound Effects Library Horns.BBC.EC3W2.wav Alarm, Horn: Sirens And Bells: Air Horn
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2.0 0:34Alarm Alarm Horn
32 Sounddogs Sound Library Horn,Squeaks,Rubber Duck,Hi.wav Alarm, Horn: Horn Squeaks Rubber Duck High
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2.0 0:01Alarm Alarm Horn
33 Sounddogs Sound Library Horn,Boat,Tug,1,Airy,Echo.wav Alarm, Horn: Horn Boat Tug 1 Airy Echo
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2.0 0:09Alarm Alarm Horn
34 Sounddogs Sound Library Horn,Truck,Single,Long,Nasa.wav Alarm, Horn: Horn Truck Single Long Nasal
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1.0 0:03Alarm Alarm Horn
35 Sounddogs Sound Library Horn,Ferry,6,Short,Even,Ech.wav Alarm, Horn: Horn Ferry 6 Short Even Echo
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2.0 0:11Alarm Alarm Horn
36 Sounddogs Sound Library Horn,Party,Blow,Squeaky,Up.wav Alarm, Horn: Horn Party Blow Squeaky Up
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2.0 0:01Alarm Alarm Horn
37 Sounddogs Sound Library Horn,Squeak,Rubber Duck,Ala.wav Alarm, Horn: Horn Squeak Rubber Duck Alarm
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2.0 0:01Alarm Alarm Horn
38 Sounddogs Sound Library Horn,Boat,2,Long,Big,Two To.wav Alarm, Horn: Horn Boat 2 Long Big Two Tone
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1.0 0:12Alarm Alarm Horn
39 Sounddogs Sound Library Horn,Toots,Honks,2,High.wav Alarm, Horn: Horn Toots Honks 2 High
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2.0 0:01Alarm Alarm Horn
40 Sounddogs Sound Library Horn,Doppler,Grand,3 Honks .wav Alarm, Horn: Horn Doppler Grand 3 Honks By
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2.0 0:21Alarm Alarm Horn
41 Sounddogs Sound Library Horn,Harley,Honk,Quick,Once.wav Alarm, Horn: Horn Harley Honk Quick Once
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2.0 0:01Alarm Alarm Horn
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