18 янв. 2023 г. · The general reason that a siren has multiple sounds, usually a “Yelp” “Hi-Lo” and 'Wail” are to let people know that an emergency vehicle is ...

25 февр. 2021 г. · Wail is most commonly used, Yelp is better when approaching and driving through intersections, and phaser is hardly ever used except for parades ...

28 апр. 2018 г. · The two standard sounds are wail and yelp. Wail is gradual increase and decrease in pitch. Yelp is a much more rapid increase and decrease in pitch.

27 сент. 2021 г. · The general reason that a siren has multiple sounds, usually a “Yelp” “Hi-Lo” and 'Wail” are to let people know that an emergency vehicle is ...

2 окт. 2020 г. · Our ambulances have three different sounds to the siren. Wail means get out of the way. The hi-low means get out of the way faster. The Phaser ...

20 июн. 2022 г. · The siren creates each new note closer to you, meaning each sound wave is being compressed, which makes the pitch higher.

21 февр. 2018 г. · 5The siren we call “wail” is for long range penetration. The other option, “yelp” is for short range. Wail has a long up and long down cycle ...

29 апр. 2021 г. · Most consoles are set to operate off a single lever. Ambulances will have the whole package going, sometimes sounding like multiple vehicles.

2 февр. 2018 г. · If you are referring to warning devices, the ambulances I use can make five. Three siren tones are available, wail, yelp and priority ...

14 янв. 2020 г. · The answer to your specific question is that the augmented fourth, or diminished fifth, is also known as a “tritone," or the devil's interval.