The “Stop That Hard Hat” is equipped with tiny speakers which play pre-recorded messages to the offending builder whenever they detect a wolf-whistle.
The first whistling offence prompts a warning about site behaviour.
And any further whistling leads to recorded readings from the works of famous feminist writers like Germaine Greer and Andrea Dworkin.
Manufacturers of the “Stop That Hard Hat” believe the politically-correct headgear will spell an end to sexist behaviour on site.
Spokeswoman Avril Una said: “The construction industry has made great strides in this field but many women are still intimidated walking past building sites.
“We believe this product will provide a constant reminder to builders of the consequences of their behaviour.”
The company is now working on a number of further launches due this time next year including “stay high” trousers to eradicate builders bum and a pill which suppresses the desire for tea drinking.