decibels
The bigger the troughs of the sound wave and height of the wave corresponds to the loudness the higher the wave the louder the sound.
The amplitude of sound waves is what humans perceive as loudness.
The loudness of a sound wave is proportional to the amplitude of the wave, which is to say, the size of the vibration.
The amplitude determines the loudness of a sound wave.
Amplitude is the energy of a sound wave, which we also call Loudness
The perceived "loudness" of the sound varies directly as the amplitude of the wave.
The 'Loudness' of a sound wave is dependent on its Amplitude, hence why we have 'amplifiers' to increase the volume of something.
The unit of relative loudness is the sone. The unit for absolute loudness, or loudness level, is the phon. Both relative and absolute loudness are perceptual measures that vary from person to person.The unit used to measure sound pressure is the dB (decibel). Since dB measures the power of a sound wave, a physical characteristic, it is not a perceptual measure but a scientific one (thus perception of the sound has no effect on it).Read more: What_is_the_unit_of_relative_loudness
Amplitude is the maximum displacement of a wave. The amplitude determine the loudness of the sound
The loudness of a sound (or intensity) corresponds to the sound wave's amplitude. The amplitude of a wave is the distance from the midpoint of the wave to a high-point (crest) or low-point (trough).
Loudness is related to the amplitude of a sound wave. The higher the amplitude of a sound wave, the louder the sound will be perceived by our ears. Amplitude represents the intensity or strength of the sound wave.
By its amplitude. Really loudness is sound intensity & intensity depends on square of amplitude ie. higher the amplitude higher the intensity which means higher the loudness.