Image: Ericsson carbon microphone opened
Size of this preview: 800 × 543 pixels. Other resolutions: 320 × 217 pixels | 2,117 × 1,438 pixels.
Original image (2,117 × 1,438 pixels, file size: 650 KB, MIME type: image/jpeg)
Description: The insides of an Ericsson carbon microphone from a telephone. Some of the carbon has fallen out of the central hole.
Usage Terms: Public domain
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