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Termanology Handout
Vocab
81
Speech-Language Pathology
Undergraduate 2
09/09/2014

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Term
Mass
Definition
fundamental property of an object that refers to the amount of matter in an object, and it's measured in kilograms or grams (m)
Term
Force
Definition
any influence that causes an object to undergo a change in speed, a change in direction, or, a change in shape
Term
weight
Definition
the force of gravity on a object and is treated to its mass
Term
volume
Definition
quantity of 3-D space occupied by a liquid, solid, and gas
Term
density
Definition
mass of a substance, a material, or an object per unit of volume, or mass divided by volume.
Term
speed
Definition
the distance traveled by an object in a given unit of time measured in meters per second (m/s)
Term
velocity
Definition
has the same numerical value as speed (m/s) but also specifies the direction of the movement
Term
momentum
Definition
refers to the mass times velocity of an object during motion, measured by kilograms times meters per second (kg-m/s)
Term
acceleration
Definition
when velocity changes as a function of time
Term
inertia
Definition
the resistance of any physical object to a change in its state of motion or rest
Term
elasticity
Definition
the property of a material that returns it to its original shape after it has been deformed by an external force
Term
stress
Definition
external force
Term
deformation
Definition
change in the shape or size of an object due to an applied force
Term
work
Definition
a force is exerted over a distance and is measured in newtons times distance and is measured in newtons times distance in meters
Term
joules
Definition
mks system or ergs in the CGS system
Term
energy
Definition
the ability to do work
Term
power
Definition
the rate of which work is done or energy used in a period of time is measured in watts
Term
intensity
Definition
power per unit of area and is measured in watts per square meter in the mks system or watts per square centimeter in the CGS system
Term
pressure
Definition
force acting perpendicularly on a scientific surface area
Term
science
Definition
a system of knowledge covering the operation of general laws obtained and tested through the scientific method
Term
natural science
Definition
domain concerned with the physical world and its phenomena, it includes fields such as stronamy
Term
physics
Definition
the science that deals with matter, energy, motion, and force, as well as the physical processes and phenomena of a particular system.
Term
acoustics
Definition
a branch of physics that deals with the production, control, transmission, reception, and effects of sound
Term
bioacoustics
Definition
the combination of biology and acoustics in the study of sound production and perception in animals including humans
Term
human speech
Definition
falls into the domain of bioacoustics
Term
strain
Definition
relative amount of deformation undergone by an object
Term
stiffness
Definition
resistance of an elastic body to deformation by an applied force
Term
air
Definition
is a gas composed primarily of nitrogen (78%) and oxygen (21%) with traces of other elements, including water vapor, carbon, dioxcide, and argon
Term
pressure
Definition
a force that acts perpendicularly on a surface
Term
atmospheric pressure
Definition
at sea level is used as a basis of comparison
Term
pressure differential
Definition
causes air to flow and creates a driving pressure
Term
driving pressure
Definition
if there is no difference in pressure between two areas, air will not flow between them, and there will be no driving pressure
Term
flow
Definition
the movement of air through a particular area in a certain interval of time
Term
volume velocity
Definition
the rate of flow
Term
ambient pressure
Definition
relatively steady pressure
Term
compression
Definition
an area of positive preasure
Term
rarefraction
Definition
an area of low pressure
Term
propagates
Definition
travels
Term
tympanic membrane
Definition
eardrum
Term
hooke's law
Definition
the restoring force is proportional to the distance of displacement and acts in the opposite direction
Term
damping
Definition
the decrease of amplitude
Term
wave front
Definition
the outermost area of the sphere
Term
inverse square law
Definition
the farther the changes in air pressure travel from the source, the more damped they become because the area of the wave front is directly proportional to the square of its distance from the source
Term
simple harmonic motion
Definition
occurs when the resting force acting on an object (i.e. elasticity) is directly proportional to the displacement of the object from its equilibrium position but in the opposite direction (i.e. toward its equilibrium position
Term
frequency
Definition
the number of cycles per second
Term
period
Definition
is the time it takes for one cycle of vibration to occur
Term
a periodic
Definition
a wave in which individual cycles do not take the same amount of time to occur
Term
wavelength
Definition
the distance in meters or centimeters covered by one complete cycle of pressure change-that is, the distance covered by the wave from any starting point to the same point on the next cycle
Term
pure tone
Definition
has only one frequency and is graphed as a sinusoidal wave
Term
waveform
Definition
a graph with time on the horizontal axis and amplitude on the vertical axis
Term
complex sounds
Definition
waves that consist of two or more frequencies
Term
fundamental frequency
Definition
lowest frequency of the sound
Term
harmonic frequency
Definition
frequency above the funamental, also called harmoonics
Term
fourieir analysis
Definition
the harmonics in a complex periodic sound can be identified through a process called fourier analysis
Term
transiet sounds/continuous sounds
Definition
voiceless stops are complex aperiodic transient sound
Term
continuous sounds
Definition
able to be prolonged
Term
transiet sounds
Definition
extremely brief in duration
Term
line spectrum
Definition
the horizontal axis represents frequency, starting with low frequencies to the left, with frequency increasing to the right
Term
harmonic content
Definition
the relationship between the frequencies in the sound and their respective amplitudes
Term
continuous spectrum
Definition
the envelope of the wave is shown as a horizontal line that is understood to connect all the component frequencies in the sound
Term
jitter
Definition
cycle to cycle variations
Term
shimmer
Definition
changes in amplitude
Term
indident wave
Definition
a sound wave generated by a vibrating source
Term
absorption
Definition
the damping of a wave, with diminishing changes in air pressure
Term
refraction
Definition
sound that is not transmitted or absorbed bounces back from the surface of the boundary and travels in the opposite direction
Term
diffraction
Definition
a change in direction as a wave passes through an opening or travels around an obstacle
Term
interference
Definition
the combining of incident and relected waves at any instant in time and space
Term
constructive interference
Definition
interference that results in increased amplitude
Term
destructive interference
Definition
the amplitude of the resulting wave is decreased
Term
phase
Definition
relative timing of areas of high and low pressure in waves
Term
reverberation
Definition
sound that lasts slightly longer because of the interference
Term
subsonic
Definition
frequencies below that range of 20 hertz
Term
supersonic
Definition
frequencies about the range of 20,000 hertz
Term
decibel scale
Definition
designed to measure sounds in a way that takes into account their amplitudes and intensities in relation to how the sound is perceived in terms of loudness
Term
linear scale
Definition
one in which units is the same distance from each other and units can be added or subtracted
Term
logarithmic scales
Definition
units that increase by greater and greater amounts going up the scale
Term
ratio scale
Definition
it reflects a relationship between quantities
Term
threshold of hearing
Definition
the softest sound of a particular frequency that a pair of normal human ears can hear 50% of the time under ideal listening conditions
Term
auditory area
Definition
a graph that represents frequency along the horizontal axis and intensity along the vertical axis
Term
threshold of pain
Definition
a frequency with an intensity of around 130 decibels
Term
audiogram
Definition
a way of representing an individuals hearing by measuring his or her threshold at selected frequency levels
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