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| when an incident wave, or first arriving wave, encounters an obstruction it is reflected back onto itself |
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| if a wave encounters an object that only partially obstructs its path, it will continue past the object, changing its shape ai it wraps around the obstruction |
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| the arriving wave of sound |
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| described as the net effect of all forces that oppose vibration |
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| the inverse of impedance, describing how well sound allow entry into a medium |
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| Often uses 20upa as its reference pressure, representing the approximate threshold of sound detection for the human ear. Simply a scale of relative measure of intensities or pressures. Prefix (deci) means one tenth, (bel) by a factor of 10 |
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| the number of times per second that a number occurs |
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| science of sound is concerned with pressure, defined as force per unit area. Equivalent to one newton of force applied to one square meter of area |
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| Decibel Hearing Level (dBHL) |
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| in audiologic settings, the reference pressure is frequency specific and represents the threshold for sound detection by normally functioning human ears at particular frequencies |
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| Decibel Sensation Level (dBSL) |
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| uses a subject's actual hearing sensitivity threshold as its reference level |
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| Decibel Intensity Level (dBIL) |
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| Decibel scale commonly used commonly used in industrial and community noise settings is called the dBA scale. Engineering and electrical applications commonly use 10 to the negative 18th power watts/cm squared as the reference intensity , resulting in the ? scale |
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| the relationship between distance that sound travels and energy it loses is known as? |
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| Intensity is always measured in? |
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| minimum perceptual intensities |
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| how different stimuli have to be to no longer appear the same |
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