Acme ‘Silent’ Dog Whistle
£33.00
The original Acme ‘silent’ dog whistle engineered to produce a fully adjustable range of frequencies between 5400 Hz and 14800 Hz, the lower audible, the higher register near silent to human ears. An improved version of the original (and first silent) design dating back to 110.5035. Each whistle is still largely hand made and individually tested in Joseph Hudson’s Barr Street factory in Birmingham, England.