Noun
PC speaker (plural PC speakers)
(computing) A device found in most IBM PC compatible computers that allows simple beeps to be output.
On the motherboard are also the ROM subsystem, DMA and IRQ controllers, coprocessor socket, sound (PC speaker, tone generation) circuitry, and keyboard interface. Source: Internet
PCI Slot 5.1 Channel Sound cards for computers compatible with the IBM PC were very uncommon until 1988, which left the single internal PC speaker as the only way early PC software could produce sound and music. Source: Internet