Term

Definition
the time it takes for one complete oscillation in seconds 


Term

Definition
the number of oscillations in unit time in hertz 


Term
define and give an example of a transverse wave 

Definition
a wave whose vibration direction is perpendicular to the wave direction; microwave 


Term
define and give an example of a longitudinal wave 

Definition
a wave whose vibration direction is parallel to the wave direction; sound waves in air 


Term
Give the perceptual variable which corresponds to frequency 

Definition


Term
Give the perceptual variable which corresponds to intensity 

Definition


Term
Give the perceptual variable which corresponds to harmonics 

Definition


Term
give the range for human hearing 

Definition


Term

Definition


Term

Definition
All vibrational systems have a natural frequency of oscillation. Energy is added using a "driver". When the frequency of the driver matches the natural frequency, an increase in vibration amplitude occurs. 


Term
Describe one medical diagnostic technique which uses ultrasound. 

Definition
Pulsedoppler: High frequency sound wave pulses are directed into the body at moving fluids (blood). The frequency shift of the reflected pulses is used to calculate flow velocity.
Frequency: 120 MHz
Maximum Intensity: 15.7 W/cm2
Pulse length: 0.310 microseconds 


Term
Describe one medical treatment technique which uses ultrasound 

Definition
Physiotherapy: High frequency sound waves are directed into the body where they are absorbed and converted into thermal energy. The increase in tissue temperature reduces pain, accelerates healing, and reduces swelling.
Frequency: 0.53Mhz
Maximum Intensity: 2.5 W/cm2
Pulse length: 28 milliseconds 


Term
Give the formula for the doppler effect 

Definition


Term
Give the formula for loudness in decibals 

Definition


Term
Equation for the period of a spring mass oscillation 

Definition
T=(2)(Pi)(square root of mass over K) or T=2Pi(square root of x/g) (K=F/X) (F=mg) 


Term
Equation for the period of a pendulum 

Definition


Term
equation for speed of sound 

Definition
V=lambda*frequency lambda= wavelength in meters 


Term
State the superposition principal 

Definition
When two or more waves meet in time and space, the result is the simple sum of the individual dispacements. 

