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true and false - 11

The acoustical function of the pinna is to concentrate more sound energy into the auditory canal since the sound energy received is inversely proportional to the area of the sound
wave front intercepted.

F

since the eardrum is 15 to 30 times larger than the oval window, it increases 15 to 30 times the effectiveness of reception in comparison with the oval window alone.

T

The three amplification mechanisms in the ear produce an effective amplification of about 280

F

A low frequency wave will peak near the oval window and excite the basilar membrane in that area.

F

The threshold of human hearing occurs at a sound intensity of about 10^-16W/cm2 (10^-14 W/cm2) at 10^3 Hz.

F

Since the sound intensity is proportional to the square of the amplitude of pressure variation above and below Patm, an intensity level 10^12times the threshold intensity would correspond to 10^9 times the pressure variation at threshold.

F

The frequency range for human hearing varies from 20 to 20 000 Hz.

T

At 10^3 Hz a frequency change of 3 Hz can be heard by most people.

F

The ear is sensitive to absolute frequency changes rather than to frequency ratios.

F

Besides the ability to distinguish between sounds of different pitch and intensity, the ear can distinguish between sounds of different quality only if they have the same pitch and intensity.

T

The logarithm to the base 10 is defined as power to which you must raise 10 to get the number.

T

If the sound intensity is 10^4 W/m2, then the relative intensity is 100 dB.

F

Sound intensity is defined as the acoustic power per unit area per unit time. It is an objective physical characteristic which does not depend on the frequency of the sound.

T

For a 100 Hz sound the loudness in phons and the intensity in decibels are always numerically equal, since 100 Hz is selected as the international standard frequency.

T

According to the equal loudness curves, the threshold of hearing is zero phons, regardless of frequency

T

At a constant frequency, an increase in intensity will decrease the perceived loudness

F

The sensitivity of human ear varies less with frequency for very loud sounds.

T

Pure tone audiometry has some advantages in comparison with speech audiometry since pure tones are the most important sounds which we must understand

F

The usual devise used to measure environmental sound is a sound-level meter with a standard contour filter which discriminates against low and high frequency sounds.

T

The energy of sound waves transmitted to the cochlea fluid activates nerve endings along the basilar membrane, and the perceived pitch is determined by the area of maximum
excitation along this membrane.

T

Sounds of equal intensity but different frequencies may be perceived to have different loudness.

T

The decibel scale actually represents the product of a sound intensity and standard threshold intensity.

T

Sound quality is mainly determined by the number and intensity of higher frequencies present in the sound.

T

Testing for hearing loss is referred to as relative intensity.

F

When comparing two sound intensities, the range of differences is so great that a logarithmic comparison scale is used.

T

The human ear is more sensitive to sounds in the frequency range 1 kHz to 4 kHz than to very low or high frequency sounds.

T

The frequency range from 2000 to 6000 Hz is the most important for speech understanding.

T

Sound waves in fluids are longitudinal waves, i.e. fluid molecules vibrate along the axis of sound propagation.

T

Loudness is an objective sound characteristic.

F

Beats occur as the result of a superposition of two sound waves of slightly different frequency.

T

Quiz
fill the blanks -10
TEMA 8. ALOPECIAS
Französisches Wetter...
bio12 digestion
витамины
Mykenisches Griechisch
Klassisches Arabisch / Koranisches Arabisch
fisica y quimica
nationaliteiten
Equality in the Workplace-GLOSSARY
10. Foreign currency
суффикс Н и НН
Español
ingles
WWII
Ligações quimicas
Teoremi Analisi II
Drugs- GLOSSARY
Learning and education - GLOSSARY
Recycling -GLOSSARY
Social causes- GLOSSARY
SVT: reproduction
universum2.test
Englischenglisch quizzs/englisch übungen
conectores
TEMA 7. HIPOACUSIAS NEUROSENSORIALES / DE PERCEPCIÓN
unit 4.
sustainable design
exam 1
unit 5 Lesson 3
Australia school #1
TEMA 6. HIPOACUSIAS DE TRANSMISIÓN. OTOSCLEROSIS
Mitigation
glosor v.20
sustainable culture
Schemiiiiiiiiiiiieeee
Section B Empire
tyska
Section B Lives of the Workers
Section B Lives of Peasantry
Section B Nature of Rule
Chem Paper 1
possibles questions de literatura
grammatica spaans
titt
true and false - 10
Iega05
Mende (Standard-Mende) (Sierra Leone)Sprachstufe: Modernes Mende; Zeitraum: 1967 bis heute; Schrift: Lateinisches Alphabet; Orth.: 1984 bis heute.
almost done
SISTEMA ENDOCRINO
Filosofi tenta [Presentationer]
PUBERTAD
lernfeld 1Ko-Konstruktion: - sozialer Prozess, in den alle Beteiligten gleichermaßen involviert sind -> Gleichrangigkeit vom lernenden Kind, den Erwachsenen und den anderen Kindern - Kind aktiv - Umwelt aktiv -...
Condições climáticas
Filosofi tenta [kurslitteraturen]
kunst
Geschichte
Fastighetsmäklarrätt
region d'espagne
16.3 Une faim de loupDel 3 av Franska glosor från Escalade 1, kapitel 12
Atmung im Tierreich
16.2 Une faim de loupDel 2 av Franska glosor från Escalade 1, kapitel 16
Atmung des Menschen
kommunikation och LAB
16.1 Une faim de loupDel 1 av Franska glosor från Escalade 1, kapitel 16
Bauchspeicheldrüse
15.2 Un jour comme tous les autresDel 2 av Franska glosor från Escalade 1, kapitel 15
Leber
15.1 Un jour comme tous les autresDel 1 av Franska glosor från Escalade 1, kapitel 15
14 Quelle vie le samediFranska glosor från Escalade 1, kapitel 14
ethik
13 Aprés la pluie le beau tempsFranska glosor från Escalade 1, kapitel 13
Verdauung des Menschen
Ausscheidung des Menschen
KO test
G. Erkrankungen
Omtenta mikrobiologi
test 2s
Latein (Schullatein)Latein, wie ich es in der Schule gelernt habe.
Future simple
Die dag op nuweland
anatmi
Cúpla-Ellie
Englisch Vokabelnschulaufgaben
Cúpla - Sharon
maths words
NL examen
PROPONENTS AND THEORIES
Spaans zinnen
Les 4
Spaans woordjes en zinnen
Stoffgemische und fachbegriffeFachbegriffe:Atomkern,ordnunszahl, Elementarteilchen, Nukleolen,Periode,Hauptgruppe, Atomhülle, Massenzahl, Valenzelektronen,Elemente, Kernladungszahl stoffgemische:Heterogen, Gemenge,Suspension, Emu...
químicaaquí me voy a guiar por componentes, mezclas, y elementos
FINALS chptr 6
FINALS chptr 5
ethics virtue
educi
biologie
an timpeallacht
answering questions
Spás vocab
sprawdzian
TEMAS 4 Y 5
Stoma
TEMA 3. OTITIS MEDIA AGUDA Y SECRETORA
Geog Paper 1 Case Studies
Ses C8
Geog Paper 1
Physics Test 3
Ethics Deon
20
significado de las palabras
St. Ignatius Quiz Religion
Traduce_semana_20_parte2
Verbi irregolari
snowfall
optikwie entsthet eine mondfinsterniss
12 Une semaine chargéeFranska glosor från Escalade 1, kapitel 12
11.2 Vacances en EuropeFranska glosor från Escalade 1, kapitel 11, del 2.
11.1 Vacances en EuropeFranska glosor från Escalade 1, kapitel 11, del 1.
Evolotion IIFragen 25 - 43
fikh 5
TEMA 2. PATOLGÍA DEL OÍDO EXTERNO
FINALS 1.3
test vies urinàries
tppd 7
scheikunde
Evolution IFragen 1 - 24
Ordi Cirugía
Parcial Cirugía
Finals ict in various content areas
FINALS TPACK
Bio Paper 1
Futur simple
Futur proche
Imparfait
Passé composé
TENMA 16. ITS
Gezondheid
DER
fcdfe
fefff
DIE
Biologi prov
DAS
Origin and meanings
classes of anano
latino
Biology Test 3
futur simple,conditionnel present uitzonderingen
Franz Julifrnz vokab
comentario de texto
Epi tenta
Vocabulary_week_20
emily
Netwerk ANS3
ANS test 4
Biokemi 6.5, 6.6, 6.7 DNA, vitaminer och vatten
hidrurs
GE 5 FINALS 1.2
GE 5 FINALS
67
unit 1
Fats
WG Französisch
Serufe
de lingära religonerna
prepositions
franska 3 np muntligt
Nkosi sikelel' i-Afrika
Motor + Volvo Språk
Anglais unit 5
house / rooms
Cuestiones Bloque 3
i,he.she give
Vir Sara Baartman
Macbeth
Camillas frågorRetina del 1
indirekte redeindirekte rede
Macronährstoffe
TEMA 14 Y 15. MANEJO DE LA FIEBRE DEL VIAJERO
regular verbs
ACC key ideas and QuotesThe message of Dickens.
Section A Alexander II
producción
Niederdeutsch (Dahlenroder Platt) (Dahlenrode, Rosdorf, Deutschland)
Random
Beschaffungsprozessbeneeb
Französische revolution
TEMA 12 LEPTOSPIROSIS
Vocabulary_week_19
MIX IDEAS PARA LLEVAR A CASA
SIGe-Plan
Oeuvres XIX
Kinders van die wind
Griego
Natuurkunde Beweging 1
Bertils frågorIris, Ciliarkropp, främre/bakre kammare, linsen
Meere und Ozeane in zentrum der Globalisierung
Latein
jp importantes famille
Frankreich, ein maritime Grossmacht ?
23
figure de style
hoofdsteden amerika
Unit 5
test 4 - copy
Sociales 2
EstudioEstudialo diario
Test nefro
Kapitel 2, del 3Avsnitt 5, Eget kapital och skulder kontoklass 2
Camillas frågorSklera, konjunktiva, glaskropp
Kapitel 2, del 2Avsnitt 4, kontoklass 1
ato ilocutorio
La Scuola (unità 6)
Biokemi 6.4 Enzymer och reaktioner i kroppen
Test
Toets11
SIN
Analytisk kemi
Mibi
unit 10
Oncología Ordinario
classificwtion
Legislacion
18.9 Ecologie en milieubescherming
18.8 Stad, land en infrastructuur
engels
18.7 Dieren
schuleprüfung
18.6 Planten, bloemen en bomen
Entrep mind L4 Quiz
Bio Klassenarbeit
18.5 Materie en stoffen
18.4 Klimaat en weer
Frans Verbo Labo
18.3 Wateren en kusten
Pulmo
18.2 Geografie
18.1 Heelal en aarde
wirtschaft
La evolución de la mujer
chemie
Español B1