![]() ![]() First, envision the air surrounding you right now. To begin this journey into the world of sound, you are going to reimagine the world around you. But before we get to effective means of sound wave absorption, let’s learn where sound comes from and how it travels. We will take a look at what sound is and how the absorption of sound really works, including some useful information on things like the sound absorption coefficient, equal loudness contour and the inverse square law sound follows so dutifully. This is why sound absorbing and soundproofing materials can stop the transfer of sound within a space, or from one space to another. It doesn’t have a shape or form, so it molds itself to its surroundings and, like water, can be absorbed by some materials and contained by others. As sound waves move further away from their source, their intensity naturally becomes less intense. To create sound that is audible to human ears, sound energy moves the molecules of the substance through which it is travelling and creates sound waves that spread in a circular pattern like ripples in a pond. These vibrations can be transmitted through solids, liquids and gases, such as squeaking floorboards, water and air. The short answer is that sound is a vibration propagating through the matter surrounding us. We take our cues from it and rely on it - and to capture it, there are even two cartilage receivers that come standard with our heads.īut what is sound? What is it made of? How can something like soft, bonded cotton or a layer of foam provide sound absorption, while a pane of solid glass does not absorb it as well? Noise Solutions for Gyms & Fitness Centers.Acoustic Solutions for the Medical Field.Soundproofing Solutions for Contractors.Existing Ceiling Soundproofing Assemblies.* Note: PDF files require a viewer such as the free Adobe Reader. The auditory nerve carries this electrical signal to the brain, which turns it into a sound that we recognize and understand. ![]() When that happens, chemicals rush into the cells, creating an electrical signal. Bending causes pore-like channels, which are at the tips of the stereocilia, to open up. As the hair cells move up and down, microscopic hair-like projections (known as stereocilia) that perch on top of the hair cells bump against an overlying structure and bend.Those closer to the center detect lower-pitched sounds, such as a large dog barking. Hair cells near the wide end of the snail-shaped cochlea detect higher-pitched sounds, such as an infant crying. Hair cells-sensory cells sitting on top of the basilar membrane-ride the wave. ![]()
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