Children's ears grow
A child's ears develop as a child grows. The audiologist must taken into consideration the increasing size of
auditory canals and ears when fitting the hearing instruments.
To illustrate, when you compare an auditory canal to an organ pipe: the longer the organ pipe, the lower the pitch, a.k.a.,
resonance frequency.
Auditory organs function in the same way as the organ pipe. As the auditory canal grows in length, the frequency of the resonances becomes lower.
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As a child grows, the residual volume, i.e., the volume between the ear
mould and the eardrum increases.
The smaller this volume is, the louder the sound stimulating the ear. The audiologist must take into consideration
the size of the residual volume must when fitting the hearing instruments.
Anatomical properties of the auditory canals change dramatically, especially during the first
four years of life, making frequent refittings necessary. Fortunately, this can be done simply and quickly with programmable hearing instruments.
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