Perfect speech is dependent on perfect hearing, correct voice production, understanding of pitch, volume and rhythm control and careful articulation.
It is a reasonable and logical observation that defective speech is often the result of imperfect hearing. Speech in its essence and performance is but an imitation of the sounds of the human voice as heard.
Defective hearing may be the main factor in many cases of speech defects, notwithstanding good voice and careful articulation. A lack of physical appreciation of pitch, volume and rhythm, due to defective hearing, may counteract all favorable elements in the production of perfect speech.
Speech is the most constant and universal instrument of exchange in the social contacts of man with man; it is the one fundamental act that distinguishes the human being from brute creation; it is a vital element of social intercourse; it is the most useful and frequent form of expression
GOLDSTEIN MA. DEFECTIVE SPEECH IN RELATION TO DEFECTIVE HEARING. Arch Otolaryngol. 1940;31(1):38–44. doi:10.1001/archotol.1940.00660010039005
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