# Shared Flashcard Set

## Details

Audiology Chap 2
Audiology Chap 2
17
Audiology
09/09/2011

Term
 Reflection
Definition
 when an incident wave, or first arriving wave, encounters an obstruction it is reflected back onto itself
Term
 Diffraction
Definition
 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
Term
 Incident Wave
Definition
 the arriving wave of sound
Term
 Impedance
Definition
 described as the net effect of all forces that oppose vibration
Term
Definition
 the inverse of impedance, describing how well sound allow entry into a medium
Term
 Sinusoid or Sine Wave
Definition
 pure tone
Term
 Decible (dB)
Definition
 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
Term
 Frequency
Definition
 the number of times per second that a number occurs
Term
 Pascal
Definition
 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
Term
 microPascal (upa)
Definition
 millionths of a pascal
Term
 Decibel Hearing Level (dBHL)
Definition
 in audiologic settings, the reference pressure is frequency specific and represents the threshold for sound detection by normally functioning human ears at particular frequencies
Term
 Decibel Sensation Level (dBSL)
Definition
 uses a subject's actual hearing sensitivity threshold as its reference level
Term
 Decibel Intensity Level (dBIL)
Definition
 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
Term
 Inverse Square Law
Definition
 the relationship between distance that sound travels and energy it loses is known as?
Term
 Decibels dB
Definition
 Intensity is always measured in?
Term
 Detection
Definition
 minimum perceptual intensities
Term
 Discrimination
Definition
 how different stimuli have to be to no longer appear the same
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