Way back in the 1860s, Joseph Hudson, who was a Birmingham trained toolmaker, converted his humble washroom at St. Marks Square into a workshop. Here he did anything he could to supplement the family income from watch repairing to cobbling shoes. Today Acme whistles are recognized as some of the finest whistles manufactured in the world.

This “Silent” Dog Whistle is precision engineered to produce a range of fundamental frequencies between 5400 Hz and 12800 Hz. Although, at this level, the whistle is insignificant to human hearing, a dog, whose ears are far more sensitive to high frequencies, will instantly become more alert to the sound of this whistle than to any other, even one of louder lower pitch.