SOUND QUALITY
A product with high quality sound is well received by customers, sells successfully and increases brand equity.
From automobiles to hand tools to heavy machinery, consumers believe that sound is a key indicator of the overall quality level of any product. The noise inevitably comes from the products, but it can often be given a proper sound, for example the massive thud of the door closing on an expensive car. Sometimes the sound is even desirable; For example, a motorcycle with a powerful and vibrant engine has a chance to please the buyer. A product with high quality sound is well received by customers, sells successfully, and increases brand equity. More than sound levels Designing a product with sound quality in mind is challenging because the “desired sound quality” “is determined by how we perceive it with our ears and brain. For example, measuring the frequency response of sound describes its timbre, but not the physical and cognitive processes that occur in our ears and brain. However, these processes affect our subjective perception of sound. Sound quality needs to be quantified to provide designers with clear goals for the big picture and to ensure sound engineering effectiveness Objective and subjective sound quality Since some people perceive sound more easily than others, a factor must be included weighting as the Zwicker volume in sound quality metrics. Only the human ear can tell if a product sounds good and therefore subjective testing of customer expectations plays an important role in determining acceptable sound quality. In group tests, listeners rate sounds and quantify quality metrics such as harshness. Analytical software converts these estimates into target values that engineers can use as targets (for example, frequency response). This methodology can be used during product development to evaluate design changes.
