=== Parameters for describing sound ===
Wavelength
the distance between the endpoints of a cycle (two peaks, for example)
usually measured in cmFrequency
number of oscillations in one second
frequency is a physical property in the world, but pitch is the mental experience of that property (the "highness" of a sound)
usually measured in Hz
Period
time required for one oscillation
usually measured in ms
  
    
      
        f
        =
        
          
            1
            T
          
        
      
    
    {\displaystyle f={\frac {1}{T}}}
  
  
    
      
        λ
        =
        
          
            c
            f
          
        
      
    
    {\displaystyle \lambda ={\frac {c}{f}}}
  

Amplitude
the magnitude of change in the pressure over one oscillationImpedence
the reluctance with which the medium can be forced into oscillation