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Across 3. whole-number multiples of the fundamental frequecny 5. the motion of a wave through a medium, or motion of a wave from one medium to another medium 7. a sound resulting from a string that vibrates with more than one frequency 8. in a standing wave, the location where the particles of the medium are at rest 10. the lowest frequency that can produce a standing wave in a given medium 17. a reflection that occurs at a media boundary where the second medium is less dense than the first medium 18. the frequency at which a medium vibrates most easily 19. periodic chance in sound intensity caused by the interference between two nearly identical sound waves 20. the process of forming a wave with a larger amplitude when two or more waves combine

Down 1. at any point the amplitude of two interfering waves is the sum of the amplitudes of the individual waves 2. in a standing wave, the location where the particles of the medium are moving with greatest speed 4. the process of forming a wave with a smaller amplitude when two or more waves combine 6. the condition in which the frequency of a wave equals the resonant frequency of the wave's medium 9. a reflection that occurs at a media boundary where one end of the medium is unable to vibrate 11. the location where two or more media meet 12. when a source of sound approaches an observer, the observed frequency of the sound increases 13. the frequency of beats produced by the interference of two waves with slightly different frequencies 14. the process of generating a new wave when two or more waves meet 15. a reduction in the amplitude of a wave as a result of energy absorption or destructive intertference 16. an interference pattern produced when incoming and reflected waves interfere with each other