Code Number: 3C30.20
Demo Title: Decibels Meter & Speaker
Condition: Excellent
Principle: Sound Intensity
Area of Study: Acoustics
Equipment:
Decibel Meter, Speaker, Amplifier, and Wave Generator.
Procedure:
Use the Db. meter to explore the perception of the ear and measured sound intensity.
References:
- Jorge Pinochet, Walter Bussenius Cortada, Mauricio Sanchez Pena, "Graphic Relation Between Amplitude and Sound Intensity Level", TPT, Vol. 59, #6, Sept. 2021, p. 467.
- Edwin A. Karlow, "Confused Terms", TPT, Vol. 52, #7, Oct. 2014, p. 391.
- Alan Bates, "Decibels Via Loudness - Distance Properties of a Loudspeaker", TPT, Vol. 52, #5, May 2014, p. 302.
- Richard P. McCall, "Earplugs and the NRR", TPT, Vol. 44, #9, Dec. 2006, p. 580.
- A. David Chandler, "A Sound-Level Meter: A Sound Investment", TPT, Vol. 17, #4, Apr. 1979, p. 251, also A Potpourri of Physics Teaching Ideas - Sound, p. 240.
- Hugh Haggerty, "Sound Intensity and Good Health", TPT, Vol. 12, #7, Oct. 1974, p. 421, also A Potpourri of Physics Teaching Ideas - Sound, p. 257.
- Lynne Peskoe-Yang, "The Power and Pain of the Police's 160 dB Sonic Weapon", Popular Mechanics, Nov. / Dec. 2020, p. 22.
- Donavyn Coffey, Sara Chodosh, "Animal Noises Are Off the Charts", Popular Science, Winter 2019, p. 13.
- Jessica Boddy, Totto Renna, "The Loudest Stuff We've Ever Measured", Popular Science, Winter 2019, p. 18.
- Rachel Feltman, "Death By Stereo", Popular Science, Winter 2019, p. 21.
- John Kennedy, Claire Benoist, "Hear No Evil", Popular Science, Winter 2019, p. 37.
- Virginia Gerwin, Eric Nyquist, "Is Life LOUD In The Ocean", Popular Science, Winter 2019, p. 38.
- Eleanor Cummins, Natalie Andrewson, "Tales From the Field", Popular Science, Winter 2019, p. 97.