Ranging from a low hum to a mew and even shrieks, these sounds are so abundant that submariners have exploited them to camouflage their own operational noises.
Ulatudes madalast üminast kriiskamise ja isegi kiljumiseni, loovad need hääled sedavõrd rikkaliku helipildi, et allveelaevnikud on nendega maskeerinud oma laevade tekitatavat müra.