sirens speaker
What is a sirens speaker?
The sirens speaker refers to the horn speaker that sends out the waring signal machine.
Air defense alarm refers to an alarm system set up to prevent enemy air attacks during the war. It is an important part of the urban air defense project, and it sounds when the city in dangerous by air raids to remind people of air defense.
Are there different types of police sirens?
Yes, different application scenarios or emergency vehicles will be equipped with different types of Siren sound.
The alarm whistle can adjust from fast to slow. Generally, there is no fixed mode, and it is relatively sharp.
Different emergency vehicles will use different frequencies of siren sound.
The most common classification of police sirens includes ambulance, police, fire fighting, and emergency (municipalities).It should be one of the two types of sirens short sounding.
Firstly,the fire truck alarm is relatively slow: low————high————low————high————low, which is a three-second long sound, one second apart, and the cycle repeats.
Secondly,the police car’s sirens are very rapid, without intervals： low-high-low-high-low.
Last but not least,the ambulance fluctuates high and low: high-low-high-low-high-low-high-low, which is a high pitch for one second, a flat pitch for one second, an interval of one second, and the cycle repeats.