What does Quiet Mark mean? Quiet Mark is an international approval award programme launched by the Noise Abatement Society in 2012. The scheme encourages companies to make quieter appliances, it independently tests and assesses them, and then awards its seal of approval only to the quietest products in any category. So if you’re looking for quiet kitchen appliances to reduce noise inside your home, it’s a great place to start. Visit the Quiet Mark website to find out more.