As used in FIFA Internationals, Premier League and Champions League. The extra high frequency of the Tornado 2000 hits heights not reached by any other whistle, this high pitch gives greater penetration and creates a crescendo of sound that cuts through even the greatest crowd noise. The T2000 has Three chambers: Two ultra-high frequencies to cut through background noise and one low frequency for a great distance. As used in FIFA Internationals, Premier League and Champions League. Two ultra-high frequencies to cut through background noise and one low frequency for a great distance.