In the context of describing a sound wave, amplitude and wavelength are two distinct properties that characterize different aspects of the wave.
Amplitude: The amplitude of a sound wave refers to the maximum displacement or variation in air pressure caused by the wave. It represents the magnitude or strength of the sound wave. In simpler terms, it corresponds to the "height" or "intensity" of the wave. A larger amplitude indicates a louder or more intense sound, while a smaller amplitude corresponds to a softer sound. Amplitude is usually measured in units such as decibels (dB).
Wavelength: The wavelength of a sound wave refers to the distance between two consecutive points that are in phase with each other. In other words, it represents the physical length of one complete cycle of the wave. Wavelength is typically measured as the distance from one peak (crest) of the wave to the next peak or from one trough to the next trough. Wavelength is inversely related to the frequency of the wave: shorter wavelengths correspond to higher frequencies, while longer wavelengths correspond to lower frequencies. In the case of sound waves, wavelength is usually measured in meters or fractions of a meter.
To summarize, amplitude relates to the intensity or strength of a sound wave, while wavelength describes the physical distance between corresponding points on the wave.