Acoustic Earpiece

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This is an acoustic earpiece or early design loudspeaker, the speaker moves in accordance with the variations of an electrical signal and causes sound waves to propagate through a medium such as air.

Keywords

Speaker, musical instrument, loudspeaker, acoustic earpiece

Galleries

Sound

Source

Government Printing Office Official Gazette (Washingon, DC: Government Printing Office, 1912)

Downloads

TIFF (full resolution)

2400×1829, 480.8 KiB

Large GIF

1024×780, 81.3 KiB

Medium GIF

640×487, 42.7 KiB

Small GIF

320×243, 14.8 KiB