सायरन हा एक सिग्नल आहे ज्यामध्ये दोन टोन असतात,

diaphone'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.

It had a small diaphone fog signal.

The fog signal is a single tone diaphone which emits 1 blast every 15 seconds.

which was thereafter replaced by a diaphone.

involved, and because the diaphone is voiced to imitate a reed stop, the transition from reed to diaphone cannot be heard.

"Type G" diaphone at Low Head Lighthouse, is the only operable foghorn of its type and is.

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.

From the early 20th century an improved device called the diaphone, originally invented as an organ stop by Robert Hope-Jones, and developed.

English by focusing on the diaphoneme, believing that it could address neutralizations better than structuralist approaches; and The Pronunciation of English.

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.

The original steam whistle fog signal was replaced with diaphone foghorns in the mid-1920s.