Chapter 18 - Posted on 2017-10-18 by Hunter Wright

1. _____________observed that when the lengths of vibrating strings are ratios of integers such as 2 to 3 or 3 to 4, the tones produced will be harmonious. 
   Your Answer: Pythagoras
2. _____________ wrote in his de Anima that impacts, blows, or impingements are required to produce sound. 
   Your Answer: Aristotle
3. _____________ made a significant contribution to the theory of acoustics in his Principia by deciphering the relationship between the speed of sound and the gas it is in. 
   Your Answer: Isaac Newton
4. The ______________ of a periodic wave is a measure of its change over a single period that indicates deviation from the point of equilibrium. 
   Your Answer: Amplitude
5. Low frequency buildup describes a particular type of constructive _____________in the low frequency spectrum. 
   Your Answer: Interference
6. The ________________is the point space where an audio engineer (or other listener) is most likely to be sitting for monitoring and mixing. 
   Your Answer: Mix Position
7. ______________ are waves that remain in a constant position. 
   Your Answer: Standing Waves
8. ______________ are any materials or structures that is naturally or designed to be acoustically unreflective. 
   Your Answer: Absorbers
9. _____________ describes the bending of waves around small obstacles and the propagation and spreading through openings and around corners. 
   Your Answer: Diffraction
10. _____________ describes the tendency for sounds to spread out evenly in a consistent medium. 
    Your Answer: Diffusion
11. ______________ is measured in Hertz abbreviated Hz: 1 Hz = 1 cycle per second. 
    Your Answer: Frequency
12. ______________ can be constructive or deconstructive depending on the phase relationship of the offending waves. 
    Your Answer: Interference
13. _____________ are the resonant frequencies of an enclosed structure. 
    Your Answer: Room Modes
14. Longer ______________ will require larger absorption materials/constructs. 
    Your Answer: Wavelengths
15. A(n) _______________ will cause sound energy to be radiated in many directions. 
    Your Answer: Diffuser