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This sound replicates the inhuman sound effect of a police siren. When used well, this can sound absolutely incredible. It takes a fair bit of practice to be able to do it and lots of experimenting to find the right position for your mouth, but keep at it and you'll have it in no time.

Standard Beatbox Notation (SBN)

{ RRn } { ^RRn } or { FFn } {^FFn }

How it's done

  1. Think of the word "new" by combining the 'n' sound and the long 'u' sound
  2. Sing a note in your falsetto voice
  3. Pucker your lips as if you were going to kiss someone, and position your teeth on your lower lips
  4. Sing while almost creating filter through the position between your top teeth and your bottom lip

Pro tip: This can be done inwards and adding a vocal tap may make it sound even more synthetic

Video tutorial

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