Category Archives: Sound Reproduction

Speaker, Cardboard, and Megaphone

Demo: OW-E-SC
Pira Index: 3E 20.00

 Lab Equipment  Directions
  1.  tape player with tape
  2. megaphone
  3. cardboard with hole as shown
  4. external speaker (on handle)
  5. RadioShack mini amplifier
  1.  Plug the tape player into the input of the mini amplifier. Attach the handled speaker to the ‘ext. speaker’ jack on the mini amplifier.
  2. Turn on the mini amplifier and the tape player and listen to the music through the external speaker. Bring the speaker against the cardboard hole and hear the change in volume. Note that the volume increases.
  3. Repeat this by using the megaphone in place of the cardboard.