The auditory output of the “Sonicguide” (Ultrasonic Spectacles) must be delivered to the ear via a coupling tube. If a ‘no-mold’ fitting is used in favour of an earmold the coupling tube may not rest in the same position with successive insertions. Two experiments demonstrate that displacements of up to 8 mm in auditory coupling-tube position do not affect object location nor shorelining. Contraindications for ‘no-mold’ fittings are discussed.
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References
1.
JeffressL. A., and BlodgettH. C.Effect of switching earphone channels upon the precision of centering.Journal of the Acoustical Society of America, 1962, 34, 1275–1276.
2.
KeenK.Preservation of constant loudness with interaural amplitude asymmetry.Journal of the Acoustical Society of America, 1972, 52, 1193–1196.
3.
KikuchiY.Objective allocation of sound-image from binaural stimulation.Journal of the Acoustical Society of America, 1957, 29, 124–128.
