A group of researchers from Austria, Czech Republic and Sweden investigated the voice of Queen singer, Freddie Mercury, to see what qualities made it unique.
The study, published in Logopedics Phoniatrics Vocology, noted among other things that the singer's voice was closer to the baritone than the tenor, and that Mercury used subharmonics, a style of singing where the ventricular folds vibrate along with the vocal folds.
According to the research, Mercury's vocal cords moved faster than other people's. While a typical vibrato will fluctuate between 5.4 Hz and 6.9 Hz, that of the Queen leader was 7.04 Hz.
A perfect wave for the vibrato assumes the value of 1, which is quite close to where the famous opera singer Luciano Pavarotti was located. The Briton, on the other hand, had a wave of an average value of 0.57, which means that his throat gave vibrations that even his Italian colleague could not reach.