Designing a 3D-Printable Occluded-Ear Simulator
Authors
Term
4. term
Education
Publication year
2020
Submitted on
2020-06-03
Pages
155
Abstract
This project investigates the feasiblity of creating a one-piece model of an IEC 60318-4 occluded-ear simulator that can be 3D-printed. The specific acoustic impedance is measured on multiple iterations of the 3D-printed model, as well as on a commercial IEC 60318-4 coupler (G.R.A.S. RA0045). These measurements revealed expected deviations based on simulations. Measuring the amplitude response of five insert earphones using the 3D-printed design revealed matching deviations to that of the specific acoustic impedance. A design was created with less than 4.4 dB deviation in free-field related one-third-octave bands across measurements on five different insert earphones, in the frequency range 200 - 10 000 Hz.
Keywords
Impedance Tupe ; Specific Acoustic Impedance ; Impedance ; Acoustic ; Coupler ; Occluded-Ear Simulator ; 711 ; 60318-4 ; 3D-Print ; 3D
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