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A rectangle opening into a trumpet shape.
Also known as: Speaker symbol, Sounder symbol, Transducer symbol
A loudspeaker is drawn as a small rectangle with a trumpet flaring from it, the rectangle standing for the driver and the flare for the radiated sound. The same outline serves for a sounder or horn, with a marking distinguishing them where it matters.
Denotes an electroacoustic transducer converting an electrical signal into sound.
Contexts: Technical drawing, Electrical equipment
Shares its outline with sounders and horns, which are distinguished by an added marking rather than by a different shape.
Contexts: Technical drawing, Electrical equipment
A small rectangle with a shape flaring outwards from one side like a trumpet mouth.