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When the cavitation bubbles collapse, they force energetic liquid into very small volumes, thereby creating spots of high temperature and emitting shock waves, the latter of which are a source of noise. The noise created by cavitation is a particular problem for military submarines, as it increases the chances of being detected by passive sonar.
Vocal sac. The vocal sac is the flexible membrane of skin possessed by most male frogs and toads. The purpose of the vocal sac is usually as an amplification of their mating or advertisement call. The presence or development of the vocal sac is one way of externally determining the sex of a frog or toad in many species; taking frogs as an ...
Dry or sore throat; Coughing (both a causal factor and a symptom of laryngitis) Frequent throat clearing; Increased saliva production; Dysphagia (difficulty swallowing) Sensation of swelling in the area of the larynx (discomfort in the front of the neck) Globus pharyngeus (feeling like there is a lump in the throat)
Audiology. Acoustic trauma is the sustainment of an injury to the eardrum as a result of a very loud noise. Its scope usually covers loud noises with a short duration, such as an explosion, gunshot or a burst of loud shouting. Quieter sounds that are concentrated in a narrow frequency may also cause damage to specific frequency receptors. [ 1]
Death rattle. A death rattle is noisy breathing that often occurs in someone who is near death. [ 1] It is caused by an accumulation of fluids such as saliva and bronchial secretions in the throat and upper airways. [ 2] Those who are dying may lose their ability to swallow and may have increased production of bronchial secretions, resulting in ...
Choked flow is a compressible flow effect. The parameter that becomes "choked" or "limited" is the fluid velocity. Choked flow is a fluid dynamic condition associated with the Venturi effect. When a flowing fluid at a given pressure and temperature passes through a constriction (such as the throat of a convergent-divergent nozzle or a valve in ...
A hoarse voice, also known as dysphonia or hoarseness, [ 1] is when the voice involuntarily sounds breathy, raspy, or strained, or is softer in volume or lower in pitch. [ 2][ 3] [clarification needed] A hoarse voice can be associated with a feeling of unease or scratchiness in the throat. [ 2] Hoarseness is often a symptom of problems in the ...
Laryngospasm. Specialty. ENT surgery. Laryngospasm is an uncontrolled or involuntary muscular contraction ( spasm) of the vocal folds. [ 1] It may be triggered when the vocal cords or the area of the trachea below the vocal folds detects the entry of water, mucus, blood, or other substance. It may be associated with stridor or retractions .