Audio Analysis

Sound Analysis Apps

• Download Sound Analysis Apps to your smartphone such as:

  • SoundBeam 

  • Frequency Meter

Simulations

• PhET

• ExploreLearning.com

• Independent sites

Graph Frequency vs. Note

Tuning forks are acoustic resonators in the form of a two-pronged fork with the prongs (tines) formed from a U-shaped bar of elastic metal. Tuning forks generate a relatively constant frequency that can be measured with sound analysis applications. The desired frequencies are printed on the tuning forks as seen in the photographs below. 

• Measure the frequencies of a series of tuning forks

  • Enter your data here

    • Copy the spreadsheet and produce a bar chart of frequency vs. note.

    • Describe the relationship between note (pitch) and frequency

Collaborative Presentation

• Provide screen captures of the following for three or more notes produced by tuning forks.

  • waveforms

  • sound spectrums 

  • frequency meter readouts 

  • Exchange the graphics in the collaborative presentation with graphics you have obtained from the analyses you have been assigned.

Match Frequencies with your Voice

• Each tuning fork slide in the collaborative presentation is followed by a "Voice" slide.  Try to match each frequency with your voice and replace the graphics appropriately with graphs of your voice.

• How does  the sound quality of your voice differ from that of the tuning fork at corresponding frequencies?

256 Hz- Middle C - waveform

256 Hz - Middle C (Spectrum)

256 Hz - Middle C - Frequency Meter

514Hz  waveform