Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

HAN1B9

IEEE / ANSI

ANSI/IEEE Microphone input form

This reference locates microphone input in Autodesk's IEEE-oriented annunciations family. A microphone indication identifies an acoustic-input transducer in a communications circuit. The public library uses HAN1B9 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.

Drawing use: Schematic
Application: Installation & communications
Reference family: IEEE / ANSI / Manufacturer
Form evidence: Microphone. Autodesk IEEE Symbol Preview: Annunciations, block HAN1B9. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.

A distinction that matters

A microphone converts sound into a signal; a loudspeaker performs the opposite role.

Full reference

HAN1B9

IEC

Microphone input

A microphone indication identifies an acoustic-input transducer in a communications circuit.

Drawing use: Schematic
Application: Installation & communications
Reference family: IEC / Manufacturer
Form evidence: Microphone input. Autodesk IEC-60617 Symbol Preview — Electroacoustic annunciation forms; vendor family reference, not certified IEC geometry or database identifier.

A distinction that matters

A microphone converts sound into a signal; a loudspeaker performs the opposite role.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.