सायरन हा एक सिग्नल आहे ज्यामध्ये दोन टोन असतात,

diaphones's Usage Examples:

1921, upon being connected to the electrical power grid, aa 110-volt electric bulb was installed, and the fog signal upgraded to twin Type "G" diaphones.

foggy weather, mariners are warned by twin compressed-air two-tone #3 diaphones, which operate on a 30-second cycle (3-second blast followed by 27 seconds.

One of the largest diaphones ever constructed, the foghorn was decommissioned in 1973 because of technological.

electric bulb was installed, and the fog signal upgraded to twin Type "G" diaphones, driven by electric air compressors.

the whistles were "less than effective" and they were replaced by dual diaphones.

and 32′ pitches, however there are a few examples of 8′ diaphones.

removed from the fog signal building and replaced by a pair of Type "F" diaphones.

with Type F diaphones, setting off another round of noise complaints, which led to the installation of a new sound reflector.

three-manual Hope-Jones organ within a parish church setting, complete with diaphones and Wurlitzer-style console.

Originally steam-powered, the steam whistles were converted to diaphones.

Diaphonology studies the realization of diaphones across dialects, and is important if an orthography is to be adequate.

The diaphone is usually found at 16′ and 32′ pitches, however there are a few examples of 8′ diaphones.

Dual diaphones were provided for a fog signal, as well as a bell and radiobeacon.