15 2. Abnormal Audiogram §◊Õ §«“¡º‘¥ª°μ‘¢Õß°“√‰¥â¬‘π¡’ 3 ·∫∫ §◊Õ 2.1 ¿“«–°“√𔇠’¬ß∫°æ√àÕß (Conductive hearing loss À√◊Õ CHL) ¡’ AC º‘¥ª°μ‘ à«π BC ª°μ‘ ·≈–¡’ Air-Bone- Gap §◊Õ ™àÕß«à“ß√–À«à“ß AC ·≈– BC ¡“° πâÕ¬μ“¡√–¥—∫°“√ Ÿ≠‡ ’¬°“√‰¥â¬‘π 2.2 ¿“«–ª√– “Σ√—∫øí߇ ’¬ß∫°æ√àÕß (Sensorineural hearing loss À√◊Õ SNHL) ¡’ AC ·≈– BC ‡§’¬ß°—π‰ª ‚¥¬„π√“¬Σ’ˇªìπ√–¥—∫πâÕ¬®–¡’ AC = BC à«π√“¬Σ’Ë ‡ªìπ√–¥—∫√ÿπ·√ß AC ·≈– BC ®–¡“°°«à“‡°≥±å¢ÕߧπΣ’Ë¡’°“√‰¥â¬‘π√–¥—∫ª°μ‘ 2.3 ¿“«–°“√√—∫øí߇ ’¬ß∫°æ√àÕß·∫∫º ¡ (Mixed hearing loss À√◊Õ MHL) °“√μ√«®«‘π‘®©—¬§«“¡º‘¥ª°μ‘¢ÕßÀŸ ¡’Σ—Èß Air-Bone-Gap ·≈– high frequency hearing loss À¡“¬‡Àμÿ ‡§√◊ËÕßÀ¡“¬· ¥ßº≈√–¥—∫°“√‰¥â¬‘π„π·∫∫øÕ√å¡ Audiogram Σ’Ëπ‘¬¡„™â§◊Õ - - , X-X-X , - - ·≈– - - √ŸªΣ’Ë 12 ¿“æ· ¥ß™π‘¥¢Õß Hearing loss Σ’Ë¡“: Sigler, B.A. and Schuring, L.T. Ear, Nose and Throat Disorders. St. Louis: Mosby-Yearbook, Inc., 1993, p. 44.
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