Sound signal
A sound signal is an acoustic signal that conveys a message .
General
It serves as a warning of dangers and is required to call emergency services ( emergency signal ). It is also used as a wake-up call and as a pause signal and time signal on the radio, see also Jingle . Another function is the alarm signal .
use
The most common sound signals in the home are the bell ( doorbell and alarm bell) and the call signal . In traffic there is the horn , the following tone horn , the bicycle bell and the whistle z. B. by traffic posts . The same thing also exists in steam traffic: the steam whistle . In civil defense or blasting warning will siren used. In addition, there are various bangs as a distress signal , warning shot , starting shot (see also starting pistol ). Sound signals also occur in shipping , for example the fog horn or siren signals such as three times briefly : “My machine is going backwards.” There are also various bells, e.g. B. the school bell or church bell / gong , which is used in the religious field.
Sound signals are often sound events carried out with signal instruments; these instruments are mostly easy-to-use musical instruments .
Law
The issuing of certain acoustic signals in public areas is generally subject to statutory regulations.
Web links
- Legal basis for the public use of emergency signs ( Memento from September 25, 2008 in the Internet Archive )