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...

Mechanical weight-driven block-signalling apparatus used in the first half of the 20th century. This announced train movements through a section or ‘block’...

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 signal horn from the 1950s was part of the work equipment used by a shunter for the industrial railway at the Henrichshütte Ironworks in Hattingen....

The signalling whistle from the 1950s was part of the work equipment used by a shunter for the industrial railway at the Henrichshütte Ironworks in Hattingen....

The steam whistle of the steamboat “Nixe” from the year 1939 served as a means of communication through acoustic signals for the inland shipping industry....