- Walker Harnden
- 5274 hertz(es)
- アメリカ合衆国 (Boca Raton)
The highest pitched whistle has a frequency of 5274 Hz (E8 standard notation), achieved by Walker Harnden (USA) at the Lynn University, in Boca Raton, Florida, USA, on 24 September 2016.
Walker attempted this record to take back the record he held previously in 2013.