Modulator

Modulator is an electronic siren or omnidirectional siren.

Also recorded as Federal Signal Modulator; Modulator Speaker Arrays.

Contents

Overview

Series of civil defense siren models manufactured by Federal Signal Corporation.

Each connection was recorded deliberately, with the basis for it kept on the internal record.

Broader subject

civil defense sirenTerminology
Established from a fact already recorded on a verified source.

Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.

1.
“Federal Signal Modulator”, English Wikipedia, consulted as further reading
reference work · Reputable secondary · Wikipedia
Consult the source
2.
Wikidata, structured authority record Q5440437: Modulator
reference work · Reputable secondary · Wikidata
Consult the source

16,158 published records in this field, each with its sources named.

Best supported in this field