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Decibel (dB)
The unit that measures the intensity or loudness of sound.
Dermoid
A cyst which may be found associated with the nose, eyebrow or neck which sometimes has connections into the brain. This cyst and its possible tract are formed during fetal development.
Deviated septum
Leaning of the septum to one side or the other of the nose; may create blockage of a nostril. More
Disfluency
Disruption in the smooth flow or expression of speech.
Dizziness
Physical unsteadiness, imbalance, and lightheadedness associated with balance disorders.
Dysarthria
A group of speech disorders caused by disturbances in the strength or coordination of the muscles of the speech mechanism as a result of damage to the brain or nerves.
Dysequilibrium
Any disturbance of balance.
Dysgeusia
Distortion or absence of the sense of taste.
Dyslexia
Learning disability characterized by reading difficulties. Some individuals may also have difficulty writing, spelling, or working with numbers.
Dysosmia
Distortion or absence of the sense of smell.
Dysphagia
Difficulty swallowing.
Dysphonia
Any impairment of the voice or speaking ability.
Dyspraxia of Speech
Partial loss of the ability to consistently pronounce words in individuals with normal muscle tone and speech muscle coordination.
Dystonia
Abnormal muscle tone of one or more muscles.
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