Basic Audio Engineering Chapter 1: SOUND AND HEARING - Posted on 2016-10-05 by Nate Sean

1. Atmospheric pressure refers to:  The density of air molecules around us at all times.    
2. Sound is made possible through the vibration of a sound source displacing the air molecules around it.  
3. Frequency in terms of waveform characteristics refers to:  The perceived pitch of a sound
4. Fundamental Frequency is the primary frequency of a sound. The sound may have overtones or lower harmonics present however the primary frequency content is called this.  
5. Sound travels at roughly 740-770 miles per hour. 
6. The tympanic membrane also known as the ear drum is a flap of skin like material that acts as a diaphragm, receiving sound pressure waves and transmitting them the three bones in the inner ear.
7. Psychoacoustics is the study of how sounds are perceived by the brain
8. Timbre refers to:  The harmonic frequency content that makes up the sound of a specific instrument.
9. ADSR stands for:  Attack, Decay, Sustain, Release
10. Auditory masking happens when one sound affects the perception of another sound by our brain either through amplitude or frequency content.  
11. Amplitude is the measure of loudness and is measured in decibels