Final answer:
Acoustic enhancement results from the interaction of sound waves with media of different acoustic impedances, leading to varying degrees of reflection and transmission. The amplification of sound, such as in musical instruments or stereo systems, is influenced by constructive and destructive interference.
Step-by-step explanation:
Acoustic enhancement refers to the increase in the intensity of sound in certain conditions. At the boundary between media of different acoustic impedances, the reflection and transmission of wave energy are influenced by the relative differences in impedance. The greater the difference in acoustic impedance, the more reflection and less transmission there is. This principle can affect the loudness of sound in different environments. For instance, when setting up a stereo system, you might find that in one area of a room the sound seems dull due to destructive interference, where waveforms cancel each other out. In another area, the sound may be excessively loud due to constructive interference, where waveforms amplify each other. Instruments such as guitars utilize resonance in their sounding boxes to amplify the sounds produced by vibrating strings, making the sound much more intense than it would be without the resonance of the sounding box.