1. Preliminary Procedures for Use of the E-A-RTONE
®
5A
Initially examine the ear canal for obstruction(s) and evaluate the proper size
of E-A-RLINK
®
disposable foam eartip needed to fit the particular ear canal.
Although the standard E-A-RLINK
®
3A fits most adult ear canals, the smaller
diameter E-A-RLINK
®
3B eartips are available if the standard eartip is too
large for full insertion in small external canals. A good seal and the proper
insertion depth will afford the greatest ambient and interaural attenuation.
Insertion procedures are the same for the E-A-RLINK
®
3A and E-A-RLINK
®
3B, but deep insertion may be difficult to achieve in extremely small ear
canals. In these instances, the newly available Infant Eartips are appropriate.
• Secure the section of black tubing, which protrudes from the
E-A-RLINK
®
eartip, to the sound tube nipple protruding from the
E-A-RTONE
®
5A case.
• Slowly roll the E-A-RLINK
®
tip into the smallest diameter possible and
insert the E-A-RLINK
®
well into the ear canal (see illustrations). The
case will function as an insertion tool. Since the eartips are 12 mm long,
the correct insertion depth into the ear canal is obtained when the rear
edge of the E-A-RLINK
®
is 2-3 mm inside the entrance of the ear canal.
• Hold E-A-RLINK
®
in the ear canal until expanded.
• After the test is completed, remove the E-A-RLINK
®
eartips and replace
with a new pair for the next subject.
3
E-A-RLINK
®
Full Insertion
Shallow Insertion
Black
tubing
Foam eartip
E-A-RTONE
Case
