Simple Harmonic Motion + Waves II Flashcards
How is the wavelength for pipes that are either both open or closed on both ends?
wavelength = 2L / n
How is the frequency for pipes that are either both open or closed on both ends?
f = nv / 2L
For pipes closed at one end and open at the other, the wavelength is
wavelength = 4L / n
For pipes closed at one end and open at the other, the frequency is
f = nv / 4L
Natural frequencies are the
Normal modes of vibration
A resonating system is when
Frequency of varying force = natural frequency
How is the amp in a resonating system?
It is at its maximum
Sound is a
Longitudinal wave
The speed of sound is the fastest in
Solids
The speed of sound is the slowest in
Gases
< 20 Hz are
Infrasonic waves
> 20k Hz are
Ultrasonic waves
Intensity is the
Power transported per unit area by a sound wave
What is the equation of intensity?
W / m^2
The amplitude of a sound wave measures its
Energy
What is the equation of Power?
P = I • A
Intensity is displayed in
Decibels
Pitch is the
Change in frequency of a sound wave that enables the listener to recognize change in a musical note
How must the oscillation be for sound to be produced?
Longitudinal
Sound must be proportional to
- Stiffness
- Pressure
- Temperature
Sound is inversely proportional to
Density
Sound waves travel slowly through substances which are
Easily distortable
Sound waves travel faster through substances which are
Rigid, since they can’t absorb sound
