The fire department bell is a component of a two-axled fire engine from the end of the 19th century. It was used to signal the right of way acoustically...

TThe tone sequence siren (German: Martinshorn) is a component of the fire engine/water tanker Magirus F Mercur 125, built in 1961. The vehicle was originally...

The tone sequence siren (German: Martinshorn) from around the year 2010 is a component from a patrol car of the city of Essen police department. In combination...

The tone sequence siren (German: Martinshorn) from around the year 2000 is a component from an unmarked police car of the city of Essen police department....

The tone sequence siren (German: Martinshorn) from around the year 2010 is a component from an unmarked police car of the city of Essen police department....

The tone sequence siren (German: Martinshorn) from around the year 2010 is a component from an unmarked police car of the city of Essen police department....

Before this police whistle from the 1980s was included in the historical collection of the Essen police, it had long been an integral part of the police...

The sound of powering mill in operation. The recording was realized in the National Museum of Agriculture and Agricultural-Food Industry in Szreniawa (Poland). Powering...

The time clock of the brand “Isgus” was used to record working hours on punch cards. Up until the 1950s, the company Viktor Chemical Works, a nitrogen...