Acoustics: Sound Creation & Propagation: Difference between revisions
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Revision as of 20:38, 24 July 2020
This lesson is part of the Fundamentals of Sound & Music module. |
Objectives
- Student will understand the basic nature of sound as vibration and how it propagates through a medium.
- Student will understand the concepts of frequency/amplitude and how they relate to pitch, loudness, and the media through which sounds travel.
- Student will be able to describe sound based on a visual representation on a spectrogram, time-frequency graph, or oscilloscope trace.
- Student will identify the basic components of musical sound: pitch (melody vs. harmony), texture, rhythm/meter (duration), timbre.
Resources
Readings
- "Lesson 2 on Physics of Sound" (Music Tech Musician).
- P. Elsea. "Sound." (UCSC Electronic Music Studios, 1995).
- "Sound" (NDT Resource Center).
- "Pitch Loudness and Timbre." (Physclips, UNSW).
Listening or Videos
- "Sound." (Physclips, UNSW).
- "Waveform Diagrams." (Project Studio Handbook).
- "Waveform Diagram Frequency and Amplitude." (Project Studio Handbook).
Tools
- Chrome Music Lab: Spectrogram
- Chrome Music Lab: Sound Waves
- Academo Virtual Oscilloscope
- Szynalski Online Tone Generator
- (Software) Audacity
Class Activities
- Discussion and definition of the physical properties of sound and how it is created
- Play sine waves at different frequencies: discuss frequency, pitch, period, amplitude (show on spectrograms/oscilloscopes)
- Play different sounds/instruments on spectrogram, oscilloscope, and time/frequency graph: compare and contrast
- Discussion of vibration, frequency, and tension using strings demonstration
Assignments
Files:
- Acoustics and Hearing Worksheet