Final answer:
Sound resonance occurs when plucking a harp string or blowing over the opening of a bottle. It's an essential part of instruments like violins and wind instruments, where it amplifies sound and creates characteristic timbres through constructive and destructive interference.
Step-by-step explanation:
The examples of sound resonance include: A. plucking a harp string producing a high tone and D. blowing over the opening of a bottle producing a low tone. Option B, hearing 'the ocean' in a seashell, is due to the sounds of the environment being resonated in the shell but does not involve resonance of the shell itself. On the other hand, option C, wearing sound cancellation earphones to block out noise, deals with active noise control technology but not resonance. Lastly, E, noticing a change in pitch of the siren as a firetruck moves past is an example of the Doppler effect, not resonance.
Resonance occurs in many musical instruments, where air columns or strings resonate to amplify sound. Vibrating strings on instruments like the violin or guitar resonate within the sounding boxes, enhancing the volume and producing characteristic timbres. Similarly, wind instruments amplify tones through the resonance of air columns. In science, achieving resonance is related to both constructive and destructive interference of sound waves. Constructive interference reinforces resonant frequencies, creating a stronger sound, whereas destructive interference diminishes non-resonant frequencies.