Meanwhile, two whistles usually indicate that a lifeguard is leaving their post to respond to a situation, which then signals other guards to expand their surveillance area. However, it's the ...

By using consistent signals, concise commands, tools such as a whistle or clicker, and a firm yet gentle tone, owners create predictable and understandable language for a dog to learn. Imagine a ...

Kockum Sonics is a worldwide supplier of alarm signal systems, and provides TYFON train whistles to the railway industry. The TYFON train whistle itself originates from the 1920s and has been used for ...

Mar. 5—WAGNER, S.D. — The sound of a curfew whistle, once a familiar childhood signal, is making a comeback in Wagner as city officials work to curb youth-related vandalism and improve public ...