correspondence via auditory signals generally created by a vibrating organ, like the larynx within the throats of mammals or the two syringes residing inside the bronchial systems of birds. Vibrations generated by these organs are modified by altering configurations of the tongue, lips, and form of the oral and nasal cavities. Other noise-generating mechanisms in animals are stridulation, the rubbing together of bodily parts.
VOCAL COMMUNICATION: “Animals often use vocal communication tactics such as cries, growls, and howls to communicate with each other. “