- _____________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** - _____________ wrote in his de Anima that impacts, blows, or impingements are required to produce sound.

**Your Answer: Aristotle** - _____________ 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** - 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** - Low frequency buildup describes a particular type of constructive _____________in the low frequency spectrum.

**Your Answer: Interference** - 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** - ______________ are waves that remain in a constant position.

**Your Answer: Standing Waves** - ______________ are any materials or structures that is naturally or designed to be acoustically unreflective.

**Your Answer: Absorbers** - _____________ describes the bending of waves around small obstacles and the propagation and spreading through openings and around corners.

**Your Answer: Diffraction** - _____________ describes the tendency for sounds to spread out evenly in a consistent medium.

**Your Answer: Diffusion** - ______________ is measured in Hertz abbreviated Hz: 1 Hz = 1 cycle per second.

**Your Answer: Frequency** - ______________ can be constructive or deconstructive depending on the phase relationship of the offending waves.

**Your Answer: Interference** - _____________ are the resonant frequencies of an enclosed structure.

**Your Answer: Room Modes** - Longer ______________ will require larger absorption materials/constructs.

**Your Answer: Wavelengths** - A(n) _______________ will cause sound energy to be radiated in many directions.

**Your Answer: Diffuser**

### Assignment Grade

**Overall Grade**: A

**Instructor Notes**:

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