Glossary beginning with R

Click one of the letters above to go to the page of all terms beginning with that letter.


recording level

"The strength of a recorded sound; teh setting of the recording equipment control that determines this strength." [1]


resonant frequency

"The frequency of an oscillating system at which the maximum amplitude of oscillation occurs in response to adriving force." [1]

"The frequency at which resonance occurs in a system. N.B., this and natural frequency are not the same thing, though often used as if synonymous by bio-acousticians... this is the frequency an applied periodic force of minimal value has to have in order to keep the system vibrating. It is clealry higher than the natural frequency." [2]


  1. Ewing AW. Arthropod Bioacoustics: Neurobiology and Behaviour. Ithaca, New York: Comstock; 1989.
  2. Broughton WB. Glossarial Index. In: Acoustic Behavior of Animals. Acoustic Behavior of Animals. Elsevier; 1963.
resonant song

"A song with almost pure dominant frequency. If thsi frequency is sufficnetly low, as is common in crickets, the song has a clear musical pitch." [1]



See Rivalry song

rivalry song

"The special song produced by two or more males reacting to one another." [1]



See Calling song

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith