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13 wrz 2022 · Figure 17.4.4 shows the relationship of loudness to intensity (or intensity level) and frequency for persons with normal hearing. The curved lines are equal-loudness curves.
For a physicist, "noise" is not just about sounds, but refers to any random physical process that blurs measurements, and in so doing stands in the way of scientific knowledge. This book deals with the most common types of noise, their properties, and some of their unexpected virtues.
Sound is a longitudinal mechanical wave. The frequency of a sound wave is perceived as its pitch. The amplitude is perceived as its loudness.
• Loudness is a physiological response of the ear to the intensity of sound. • The amount of sound energy passing each second through unit area is called the intensity of sound.
In acoustics, loudness is the subjective perception of sound pressure. More formally, it is defined as the "attribute of auditory sensation in terms of which sounds can be ordered on a scale extending from quiet to loud". [ 1 ] The relation of physical attributes of sound to perceived loudness consists of physical, physiological and ...
Sound information is transmitted by the amplitude and frequency of the vibrations, where amplitude is experienced as loudness and frequency as pitch. The familiar movement of an instrument string is a transverse wave, where the movement is perpendicular to the direction of travel (See Figure 1).
The purpose of this chapter is to provide a brief, but thorough overview of how loudness is measured, how it is affected by physical parameters, and how intensity is coded in the auditory system. It will also provide a historical overview of loudness modelling and examine how context and impairment can affect our perception of loudness.
