COMD 5070: WK 1, CH. 2 - SOUND WAVES

A row of dominoes falling over one by one is an example of what kind of wave? - answer- A waveform is a graphic representation of a changing shape of some phenomena (a vibration in this case) as a function of _______. - answer- Antinodes - answer- By convention, when we graphically display a soundwave, what does the horizontal X-axis represent, and what does the vertical Y-axis represent? - answer- Calculate the frequency of the soundwave with the period of 6.5 ms. - answer- Calculate the period of a 220 Hz soundwave to the nearest tenth. - answer- Complex wave - answer- Compression - answer- Constructive interference - answer- Describe the appearance of a periodic waveform. - answer- Describe the three harmonics. - answer- Describe the three types of behaviors that can occur when a soundwave meets a boundary. - answer- Destructive interference - answer- Elasticity - answer- Equilibrium - answer- Explain a cycle of vibration - answer- Explain the relationship between stiffness and elasticity. - answer- Force - answer- Frequency - answer- How are pressure and amplitude of vibration related to intensity? - answer- How do we measure intensity? - answer- How does loudness relate to intensity? - answer- How does pitch relate to fundamental frequency? - answer- How is energy transferred in a soundwave? - answer- How is the natural resonant frequency of an object affected by it's stiffness, mass, and length? - answer- If you play any 12 consecutive keys on the piano, you have played a _______ scale. - answer- Intensity - answer- Line and continuous Spectra represent what types of sound, respectively? - answer- Longitudinal pressure wave - answer- Mechanical wave - answer- Momentum - answer- Name the four possible boundary behaviors that can occur when a soundwave and counters a change in the medium. - answer- Name the two ways by which energy can be transferred in a wave - answer- Natural resonant frequency - answer- Nodes - answer- Oscillation - answer- Period - answer- Pressure - answer-A force divided by the area over which the force is exerted. Pulse wave - answer- Rarefaction - answer- Speech production is the process of producing _______. - answer- Speed - answer- Standing wave - answer- Stiffness - answer- The intensity of a sound must increase by a factor of ______ for the sound to be perceived as twice as loud? - answer-