Method to assess acoustical two-port properties of earplugs
(2004) In Acta Acustica united with Acustica 90(1). p.137-151- Abstract
- An experimental setup for objective measurements of high impedance objects in ducts, yielding the acoustical Two-Port properties of the object, is presented. The setup has been applied on earplugs. A frequently used experimental setup for measuring objective acoustical properties of earplugs is that of artificial ears. Great effort is spent duplicating the ear of a person. The insertion loss is considered to give the acoustical properties of the object. Such a setup, however, gives a ratio of the 'response of a system' to that of another system. The actual properties of the object are thereby embedded in a complicated artificial response. By instead fitting the test object in a duct, its Two-Port properties can be assessed, given the sound... (More)
- An experimental setup for objective measurements of high impedance objects in ducts, yielding the acoustical Two-Port properties of the object, is presented. The setup has been applied on earplugs. A frequently used experimental setup for measuring objective acoustical properties of earplugs is that of artificial ears. Great effort is spent duplicating the ear of a person. The insertion loss is considered to give the acoustical properties of the object. Such a setup, however, gives a ratio of the 'response of a system' to that of another system. The actual properties of the object are thereby embedded in a complicated artificial response. By instead fitting the test object in a duct, its Two-Port properties can be assessed, given the sound pressure level at both sides of the object for two sufficiently different termination impedances. Furthermore, the Two-Port properties of four earplugs have been numerically coupled to a model of the ear in order to predict the insertion loss. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/288516
- author
- Hiselius, Per LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Acta Acustica united with Acustica
- volume
- 90
- issue
- 1
- pages
- 137 - 151
- publisher
- EDP Sciences
- external identifiers
-
- wos:000188782900015
- scopus:1242307803
- ISSN
- 1436-7947
- language
- English
- LU publication?
- yes
- id
- 2d854b12-2214-4535-aeee-85642032557d (old id 288516)
- alternative location
- http://openurl.ingenta.com/content?genre=article&issn=1610-1928&volume=90&issue=1&spage=137&epage=151
- date added to LUP
- 2016-04-01 16:21:14
- date last changed
- 2022-01-28 19:06:49
@article{2d854b12-2214-4535-aeee-85642032557d,
abstract = {{An experimental setup for objective measurements of high impedance objects in ducts, yielding the acoustical Two-Port properties of the object, is presented. The setup has been applied on earplugs. A frequently used experimental setup for measuring objective acoustical properties of earplugs is that of artificial ears. Great effort is spent duplicating the ear of a person. The insertion loss is considered to give the acoustical properties of the object. Such a setup, however, gives a ratio of the 'response of a system' to that of another system. The actual properties of the object are thereby embedded in a complicated artificial response. By instead fitting the test object in a duct, its Two-Port properties can be assessed, given the sound pressure level at both sides of the object for two sufficiently different termination impedances. Furthermore, the Two-Port properties of four earplugs have been numerically coupled to a model of the ear in order to predict the insertion loss.}},
author = {{Hiselius, Per}},
issn = {{1436-7947}},
language = {{eng}},
number = {{1}},
pages = {{137--151}},
publisher = {{EDP Sciences}},
series = {{Acta Acustica united with Acustica}},
title = {{Method to assess acoustical two-port properties of earplugs}},
url = {{http://openurl.ingenta.com/content?genre=article&issn=1610-1928&volume=90&issue=1&spage=137&epage=151}},
volume = {{90}},
year = {{2004}},
}