air conduction


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Related to air conduction: bone conduction

conduction

 [kon-duk´shun]
conveyance of energy, as of heat, sound, or electricity.
aberrant ventricular conduction the temporary abnormal intraventricular conduction of supraventricular impulses; called also ventricular aberration.
aerial conduction (air conduction) conduction of sound waves to the organ of hearing in the inner ear through the air.
anterograde conduction
1. forward conduction of impulses through a nerve.
2. in the heart, conduction of impulses from atria to ventricles.
atrioventricular conduction (AV conduction) the conduction of atrial impulses through the atrioventricular node and the His-Purkinje system to the ventricles.
bone conduction conduction of sound waves to the inner ear through the bones of the skull.
concealed conduction conduction that is not seen on the surface electrocardiogram but may be detected by its effect on subsequent impulses; common examples are the incomplete penetration of the AV junction during atrial fibrillation, the Wenckebach type penetration during atrial flutter, and the retrograde incomplete penetration following ventricular ectopic beats.
decremental conduction a gradual decrease in the stimuli and response along a pathway of conduction; it occurs in nerve fibers with reduced membrane potentials.
retrograde conduction transmission of a cardiac impulse backward in the ventricular to atrial direction; particularly, conduction from the atrioventricular node into the atria.
saltatory conduction the rapid passage of an electric potential between the nodes of ranvier in myelinated nerve fibers, rather than along the full length of the membrane.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

air con·duc·tion

in relation to hearing, the transmission of sound to the inner ear through the external auditory canal and the structures of the middle ear.
Farlex Partner Medical Dictionary © Farlex 2012

air con·duc·tion

(ār kŏn-dŭk'shŭn)
In relation to hearing, the transmission of sound to the inner ear through the external auditory canal and the structures of the middle ear.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

air con·duc·tion

(ār kŏn-dŭk'shŭn)
In relation to hearing, the transmission of sound to the inner ear through the external auditory canal and the structures of the middle ear.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Whereas, there were no statistically significant differences between the perforation location groups of Group 1 and Group 2 in terms of mean air conduction threshold, mean air-bone gap, and PTA1-PTA2 values on the Mann-Whitney U test (p-value: 0.248 and 0.35 for PTA1 and PTA2, respectively).
Caption: Figure 1: Mean pure tone air conduction thresholds for the PD and control groups.
Patient 1 2 3 4 5 Operated ear Preoperative hearing (air conduction; 500-4000 Hz) 50 41 55 73 54 Preoperative air-bone gap (500-4000 Hz) 30 23 28 43 38 Follow-up (months) 34 26 29 29 20 Postoperative hearing (air conduction; 500-4000 Hz) 28 28 39 45 28 Postoperative air-bone gap (500-4000 Hz) 18 5 24 14 15 Air-bone gap closure achieved 13 18 4 29 23 Patient 6 7 Mean SD Operated ear Preoperative hearing (air conduction; 500-4000 Hz) 38 36 49.5# 12.7 * Preoperative air-bone gap (500-4000 Hz) 34 35 32.7# 6.6 * Follow-up (months) 22 15 25 6 * Postoperative hearing (air conduction; 500-4000 Hz) 19 19 29.1# (a) 9.7 * Postoperative air-bone gap (500-4000 Hz) 9 13 13.8# (b) 6.0 * Air-bone gap closure achieved 25 23 18.9 8.5 * (a) P = 0.0061; (b) P = 0.00012.
The Tomatis listening tests I have observed or taken part in assess air conduction with the use of headphones that fit around the ear.
The averaged of the air conduction (AC) and bone conduction (BC) thresholds of right and left ears, obtained for the frequencies 250, 500Hz, and 1, 2, and 4KHz are shown in Fig.
Mean Distribution of PTA Air Conduction (AC) in Different Stages (Before Surgery).
Air conduction hearing thresholds were evaluated between 250 Hz and 8000 Hz, and bone conduction hearing thresholds were evaluated between 500 Hz and 4000 Hz.
Pure tone audiometry (PTA) threshold for each ear was determined at 250Hz, 500Hz, 1KHz, 2kHz, 4KHz and 8KHz by air conduction. Also bone conduction measurements were obtained at 500Hz, 1KHz, 2KHz and 4KHz with the appropriate bone vitrator placed on the respective mastoid bone to confirm the presence of hearing loss.
Tomatis's contention is that osseous conduction is the major route of sound conduction to the inner ear, not air conduction. Air vibration hits the tympanic membrane.
At audiometry, the air conduction pure-tone average (PTA) and bone conduction PTA of the right ear were 50 and 30 dB hearing level (HL), respectively.
Pure tone audiometry was performed and air conduction threshold and air-bone gap were noted.
Data collected included air conduction (AC) at 250 to 8,000 Hz, speech reception thresholds, bone conduction (BC) at 500 to 4,000 Hz, and air-bone gap (ABG) at 500 to 4,000 Hz.

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