As an expert in the field of acoustics, I can explain that when the amplitude of a sound wave increases, several things are affected. The most noticeable effect is that the sound is perceived as louder. This is because the amplitude is directly related to the intensity of the sound, which is a measure of the amount of energy that the sound wave is carrying. As the amplitude gets larger, the energy carried by the wave also increases, resulting in a louder sound. In addition to loudness, the amplitude can also affect the clarity or quality of the sound, especially in musical contexts. Higher amplitudes can make certain frequencies more pronounced, which can add richness and depth to the sound. However, it's important to note that an increase in amplitude does not necessarily mean an improvement in sound quality, as too much can lead to distortion. In summary, the primary aspect that increases with the amplitude of a sound wave is the loudness or intensity of the sound. read more >>

The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. This is illustrated below. The amplitude of a wave is related to the amount of energy it carries. ... As the amplitude of the sound wave increases, the intensity of the sound increases.read more >>