What symbol is used to represent a speaker in TPC schematics?

The symbol used to represent a speaker in TPC schematics is characterized by a circle with sound waves emanating from it. This design effectively conveys the function of a speaker, as sound waves are a visual representation of audio output. In circuit diagrams, symbols are created to provide an instant understanding of the component's purpose, and the depiction of sound waves radiating from a circle directly relates to sound production, making it immediately recognizable to those examining the schematic.

Other symbols mentioned do not align with the conventional representation of a speaker; for example, a rectangular box may indicate a switch or another type of device, while a diamond shape with a sound icon does not follow standard practices in schematic design for this specific component. Similarly, a square with a volume knob might suggest a control device rather than a speaker itself. The use of the circle and sound waves is established in industry standards, allowing anyone familiar with electrical schematics to quickly identify the role of the speaker in a circuit.