Impacts of anthropogenic sound on marine mammals
This activity was selected for the Teaching Computation in the Sciences Using MATLAB Exemplary Teaching Collection
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This page first made public: Aug 23, 2019
Context for Use
Description and Teaching Materials
MATLAB Live script and .wav files (Zip Archive 16.2MB Sep18 19)
Teaching Notes and Tips
1) Two spectrograms, one of the orca call and one of the zodiac motor. Make sure that you provide captions for each figure.
2) A brief description of the approximate frequencies and amplitudes of both sounds. They can create boxplots to help with that.
3) A brief page on how anthropogenic noise may impact marine mammal communication. Include some measures you think are importnat to lessen the impact of noise on marine mammals. (HINT: You may want to do some research on the attenuation of sound in water) Make sure that you reference your work appropriately.
Students are graded on the accuracy of their spectrogram and the presentation of their plots. Are axes labeled? Is there a colorbar? Are the units on the axes correct? By creating the boxplot of frequency, they should be able to provide a number mean frequency of the ocean and zodiac sounds.
In the discussion they should provide some information regarding the frequencies and intensity of each sound and see if they overlap. In other words, is the noise from the zodiac motor louder than the communication call of the orca? Students should also consider attenuation of the sound in the water and discussion potential conservation measures to protect the behaviour of marine mammals
References and Resources
Reading: Ryan et al., (2016) New Passive Acoustic Monitoring in Monterey Bay National Marine Sanctuary. IEEE Xplore. DOI: 10.1109/OCEANS.2016.7761363