• Heavy Machine Shop

    Thomas Edison

    National Historical Park New Jersey

Talking Doll Record: Hear the Audio

 
The record groove surface viewed under a microscope.

The record groove surface viewed under a microscope.  The nearly uniform groove width shows Edison's early square "chisel-cut" recording technique, used prior to August 1889. 

National Park Service

Specifications of the tin cylinder phonograph record:

  • Estimated original outer diameter (if not misshaped): ~60.4 mm (~2-3/8 inch)
  • Estimated original inner diameter (if not misshaped): ~53.7 mm (~2-1/8 inch)
  • Width: ~ 11.4 mm (~7/16 inch)
  • Thickness: ~ 3.4 mm (~1/8 inch)
  • Groove threads per inch: 50
  • Groove type: Vertical cut, nearly uniform groove width.
  • Recording/playback speed: Unknown. (The playback speed/pitch of the recording as presented here was set by ear.)

Return to "Early Talking Doll Recording Discovered" page.

Did You Know?

The talking doll that Edison sold had a ceramic head and metal body.

Was Teddy Ruxpin the first talking doll? Think again. Some of the first phonographs that Thomas made were actually talking dolls. The dolls were 18" tall and each had a very small phonograph in its body. The dolls repeated nursery rhymes. You could even buy dolls that spoke different languages.