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Akustik, Optik, Röntgen: Formelsammlung und Zusammenfassung für Mediziner*innen

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- Zusammenfassung für die zweite Physik-Klausur im Wintersemester 2020/21 - wichtigste Formeln und Definitionen; - kein Anspruch auf Vollständigkeit

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May 6, 2021
Number of pages
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Written in
2020/2021
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7. Akustik
7.1
sdnauerzreugung
Schau
Schwankung der Dichte eines Mediums ; Ausbreitung inaue
>




Infraschall f- <1GHz
Raumrichtungen
- :



'
Hörsaal : f- 1GHz -

20kHz
Ultraschall f > 20kHz
'

:




72
schauausbreitung
Schallquelle überträgtrhythmisch Kraft auf Moleküle des umgebenden
Mediums

LongitudinalSchwingung

Schallgeschwindigkeiten C. =D f -
=
# jehoherdier-requena.de
höher der Ton desto kleiner
-3433 ,


die
Wellenlänge
Schallintensität : E -




mmm

Schallstärke
"
(= -
ünw

TA mz .




Schalldruckpegel
dfpu.MG#es
Stärke

SchallwellenWiderstand :
DB
-20dg !
-




2=90
mmm




Schallintensität
spegd Schaltleitung
pro Fläche
Schaltleitung :
DB -10 -




eg !
f- t.tt
nun

in W


schauten
p= #
20-20000 HD
73
Schallwahrnehmung
subjektive Schallwahrnehmung in Phan
1kHz : 1dB -1 Phon


Schallintensitätspegd
2=109 ! in DB
Vlog

, 7. 4 Doppler
Sonographie
-




7. 4.1 Doppler -
Effekt

Veränderung Abstand Sender ,
Empfänger → Veränderung Frequenz

f- =
f( C ± V /C ± V )
Empfänger Empf .
sender



+
Annäherung




Entfernung
-




f. (1 E)
'

des Beobachters f ±
Bewegung
: =




¥¥
'


Bewegung der,Schallquelle
: f =

1



7. 4.2
Messung der
Strömungsgeschwindigkeit des Blutes
£4.03
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