Listen to and download fire and industrial alarm horn sounder tones

Below you will find a list of all standard alarm tones available on E2S alarm horn sounders. Many sounders offer up to 45 alarm tones and four stages as standard and bespoke tones can also be created and factory programmed into the devices.

Each product page details the number of alarm tones and stages available on the particular sounder. 

Additionally, the Appello X range of next generation tone and voice alarms can record up to 2 minutes of content which can be played with or without the standard alarm tones. For more information about our tone and voice alarms, follow this link to view the Appello X range.
ToneWAV fileFrequency Description

T 1   340 Hz Continuous

T 2   800/1000Hz @ 0.25 sec Alternating

T 3   500/1200Hz @ 0.3Hz 0.5 sec Slow Whoop

T 4   800/1000Hz @ 1Hz Sweeping

T 5   2400Hz Continuous

T 6   2400/2900Hz @ 7Hz Sweeping

T 7   2400/2900Hz @ 1Hz Sweeping

T 8   500/1200/500Hz @ 0.3Hz Sweeping

T 9   1200/500Hz @ 1Hz - DIN / PFEER P.T.A.P.

T 10   2400/2900Hz @ 2Hz Alternating

T 11   1000Hz @ 1Hz Intermittent

T 12   800/1000Hz @ 0.875Hz Alternating

T 13   2400Hz @ 1Hz Intermittent

T 14   800Hz 0.25sec on, 1 sec off Intermittent

T 15   800Hz Continuous

T 16   660Hz 150mS on, 150mS off Intermittent

T 17   544Hz (100mS)/440Hz (400mS) - NF S 32-001

T 18   660Hz 1.8sec on, 1.8sec off Intermittent

T 19   1.4KHz-1.6KHz 1s, 1.6KHz-1.4KHz 0.5s -NFC48-265

T 20   660Hz Continuous

T 21   554Hz/440Hz @ 1Hz Alternating

T 22   544Hz @ 0.875 sec. Intermittent

T 23   800Hz @ 2Hz Intermittent

T 24   800/1000Hz @ 50Hz Sweeping

T 25   2400/2900Hz @ 50Hz Sweeping

T 26   Bell

T 27   554Hz Continuous

T 28   440Hz Continuous

T 29   800/1000Hz @ 7Hz Sweeping

T 30   300Hz Continuous

T 31   660/1200Hz @ 1Hz Sweeping

T 32   Two T chime.

T 33   745Hz @ 1Hz Intermittent

T 34   1000 & 2000Hz @ 0.5 sec Alternating - Singapore

T 35   420Hz @ 0.625 sec Australian Alert

T 36   500-1200Hz 3.75sec /0.25sec. Australian Evacuation Tone

T 37   1000Hz Continuous - PFEER Toxic Gas

T 38   2000Hz Continuous

T 39   800Hz 0.25sec on, 1 sec off Intermittent

T 40   544Hz (100mS)/440Hz (400mS) - NF S 32-001

T 41   Motor Siren - slow rise to 1200 Hz

T 42   Motor Siren - slow rise to 800 Hz

T 43   1200 Hz Continuous

T 44   Motor Siren - slow rise to 2400 Hz

T 45   1KHz 1s on, 1s off Intermittent - PFEER Gen. Alarm

Hootronic and Belltronic Alarm Tones and Sounds


Additionally, the E2S Hootronic alarm horn sounders faithfully replicates the sounds made by legacy electro-mechanical signalling devices. 

Tone WAV file Frequency Description.

T 1   Industrial Claxon
T 2   High Frequency Mechanical Siren
T 3   Medium Frequency Mechanical Siren
T 4   Electro Mechanical Buzzer
T 5   Mechanical Bell

Choose a range below to view the products:

Listen to Evacuation Alarms Tones and Sounds


Evacuation sirens are used in many applications to provide a warning or notification of approaching danger, for example: tsunami warning, civil defence, tornado alert, toxic leaks, flood warnings and in a range of other emergency situations.

Many countries, such as Australia have a national 'evacuate tone'; the UK however does not. The relevant standard, BS 5839-1, merely states that the evacuate tone should contain frequencies within the range 500Hz to 1000Hz. However, for particular applications, such as offshore use, specific tones are defined. Known as PFEER– Prevention of Fire, Explosion and Emergency Response – as a minimum, there must be provision for three types of alarm on the installation or platform:

1. ‘Prepare for evacuation’ is a continuous constant amplitude signal with varying frequency of 1200Hz to 500Hz over one-second then repeated.

This alarm is tone 9 in the E2S alarm sounders, you can listen to the tone here:

T 9   1200/500Hz @ 1Hz - DIN / PFEER P.T.A.P.


2. ‘Toxic gas alarm’ is a constant 1000Hz tone reinforced where necessary with a red beacon or strobe.

This alarm is tone 37 in the E2S alarm sounders, you can listen to the tone here:

T 37   1000Hz Continuous - PFEER Toxic Gas


3. Other cases for alarm (Fire) is a 1000Hz, one-second on, one-second off tone reinforced where necessary with a yellow beacon or strobe.

This alarm is tone 45 in the E2S alarm sounders, you can listen to the tone here:

T 45   1KHz 1s on, 1s off Intermittent - PFEER Gen. Alarm


Choose your application below to view suitable audible signals: 

Hazardous area:

Fire & Industrial:

Wide area / disaster / mass notification /evacuation sirens:

Country specific or custom tone configurations and alarm frequencies are available upon request. Please contact us for further information. 


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