What is covered in the Year 12 Sound In Practice excursion?

It is a 2.5 hour session which covers:

  • Basics such as amplitude, loudness, dB, wavelength, frequency and pitch
  • Human hearing and the Phon curves
  • Harmonic structures in strings and air columns – with practical demos on guitar, flute and clarinet as examples
  • Analysis of human voices in terms of harmonic structures, as well as frequencies produced for vowels and consonants
  • Frequency Response curves
  • Dynamic Microphone principles related electromagnetic induction
  • Condenser Microphone principles related to electrostatics, including the need for phantom power
  • Diffraction and dispersion in relation to sound reproduction and reinforcement
  • Loudspeaker designs relating to baffles, ports and dealing with resonance
  • Data logging of frequency responses of microphones and loudspeakers
  • A ‘Virtual Guitar” demonstration, which brings the theory together in the form a guitar solo

Resources

Resources given to teachers at the conclusion of the session include:

  • A copy of the PowerPoint presentation for distribution to students
  • Results from the data logging
  • A worksheet for students to analyze the results (Many schools use this as part of assessment)
  • A teacher copy of the worksheet with suggested answers