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Bücher Englische Bücher Wissen & Bildung Naturwissenschaft, Medizin, Informatik, Technik Physik & Astronomie Mechanik & Akustik Finite Element simulation of external ear sound fields for the optimization of eardrum-related measurements
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Finite Element simulation of external ear sound fields for the optimization of eardrum-related measurements
Sebastian Schmidt (Broschiert, Englisch)
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Beschreibung
The sound pressure p₊T at the human eardrum has essential advantages as
reference signal in audiological and psychoacoustical experiments.
Unfortunately, precise pressure measurements very close to the tympanic
membrane are difficult. In practice, the microphone has to be positioned at
a certain distance from the eardrum. The measured pressure then has to be
transformed to the eardrum. As a… ``classical'' approach for the estimation of
the necessary transfer function, an acoustical network model of the ear
canal is developed from geometrical data of the canal (cross-sectional area
function) which is in turn determined from measurements of its acoustical
input impedance. Such methods, however, do not provide robust results.
In this thesis, the concept of one-dimensional models of the ear canal is
examined to find the origin of these errors. For this purpose, the sound
field at the human external ear was analyzed using finite element models.
Inside the canal, irregular three-dimensional structures occur that cannot
be modelled accurately using classical one-dimensional network concepts.
Upon these findings, an accurate, efficient and highly feasible method for
the estimation of p₊T was developed. Equal-loudness level contours with
reference to the eardrum pressure that were measured as pilot application of
the new method are presented. Dieses Produkt haben wir gerade leider nicht auf Lager.
Handgeprüfte Gebrauchtware
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Technische Daten
Erscheinungsdatum
31.08.2009
Sprache
Englisch
EAN
9783832522629
Herausgeber
Logos Berlin
Sonderedition
Nein
Autor
Sebastian Schmidt
Seitenanzahl
153
Einbandart
Broschiert
Schlagwörter
Hörakustik, Audiologie, Messtechnik, Finite Elemente, Psychoakustik
Thema-Inhalt
PHD - Klassische Mechanik
Höhe
210 mm
Breite
14.5 cm
Hersteller: Logos Verlag Berlin GmbH, Georg-Knorr-Str. 4, Geb. 10, Berlin, Deutschland, 12681, redaktion@logos-verlag.de
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★★★★★
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