AOSafety E-A-RTONE 3A Benutzerhandbuch

 

2

Initially examine the ear canal for obstruction(s) and evaluate the proper size  E-A-RLINK

 disposable foam eartip needed to fit the 

particular ear canal.  Although the standard E-A-RLINK

 3A fits most ear canals, for smaller ear canals, the smaller diameter 

E-A-RLINK

 3B eartips are available.  It is important to obtain a good seal and achieve the proper insertion depth.  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, a shallow placement will have to suffice. 
 

Secure the section of black tubing, which protrudes from the  

E-A-RLINK

 eartips to the sound tube nipple located at the end of the E-A-RTONE

 sound tube. 

 

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).   
 
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  

2-3mm inside the entrance of the ear canal. 
 

Hold E-A-RLINK

 in 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. 

 
 

 

 

 

      

 

     Shallow Insertion 

Proper insertion depth is necessary to achieve maximum ambient noise attenuation and interaural attenuation.  The graph below 
depicts interaural attenuation as a function of insertion depth.  The described interaural attenuation is obtained for each ear in which 

the E-A-RLINK

 is fully inserted, regardless of whether it is the “sending” ear or “receiving” ear.