PHYS 305 Study Guide - Comprehensive Final Exam Guide - Natalie Buchanan, Hms Audacity (D10), Wavelength
20 Nov 2018
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Lecture 2 report: elements required to produce, transmit, and receive sound. Source provides energy, vibrates, and resonates. Energy to get it going, vibrations, resonant surface moves them. Medium transports the vibrations (pressure disturbances move through the medium) Usually air in our case; air particles move vibrations via pressure disturbances. Ex: ear drum = receiver, brain helps us perceive the sound. Waves: waves: pressure, electric, or magnetic intensity, electrical potential, or temperature disturbances, sound is a wave: Pressure disturbances that move from source to receiver. Pure tone the building block: pure tone (sine wave) no instrument that produces a pure sine wave, complex tone: combinations of pure tones. Timbre: quality of tone (depends on frequency and amplitude of each sine wave that is in the complex tone) [looking at examples in audacity, descriptions in experiment guides] Listening to sine waves, square waves, etc. (different timbres) Complex waves different pattern(s) but can still measure the frequency.
