Physics

3. / the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone
4. / a component frequency of an oscillation or wave
5. / the measurable amount of a property, such as force, brightness, or a magnetic field
6. / the fact or phenomenon of light, radio waves, etc., being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density
10. vibration / when one object vibrating at the same natural frequency of a second object forces that second object into vibrational motion
12. / a sound or series of sounds caused by the reflection of sound waves from a surface back to the listener.
14. / prolongation of a sound; resonance
15. / a region in a longitudinal wave where the particles are closest together
17. / another term for timbre
18. / relating to or denoting sound waves with a frequency below the lower limit of human audibility

1. frequency / the frequency at which a system oscillates when not subjected to a continuous or repeated external force
2. / characteristic of a sound that is primarily a psychological correlate of physical strength (amplitude)
5. / the combination of two or more electromagnetic waveforms to form a resultant wave in which the displacement is either reinforced or canceled
7. frequency / the lowest frequency produced by the oscillation of the whole of an object, as distinct from the harmonics of higher frequency
8. / a main accent or rhythmic unit in music or poetry
9. / the reinforcement or prolongation of sound by reflection from a surface or by the synchronous vibration of a neighboring object
11. / region in a longitudinal wave where the particles are furthest apart
13. / of or involving sound waves with a frequency above the upper limit of human hearing.
16. tone / one of the pure tones forming a part of a complex tone