Psychoacoustics

Question 1

Compares the loudness level of a sound at one frequency to the same loudness at another frequency

Answer 1

Phons

Question 2

Uses average normal judgements of loudness going up frequency, not across frequency

Answer 2

Sones

Question 3

The vocal folds set up secondary vibrations known as ___ which reinforce some frequencies more than others the reinforced frequencies are called ___

Answer 3

Harmonics/ Formants

Question 4

Power is referenced on the left in dB’s and clarity is referenced on the

Answer 4

Right

Power in the LF’s vowel area gives the voice timbre and tonal quality as well as clarity in the HF’s

Question 5

Ear canal resonance is approximately

Answer 5

2700Hz

Question 6

The loss of the ear canal resonance due to a HA or earmold, pt also experiences the occlusion effect where their own voice sounds louder

Answer 6

Insertion Loss

Question 7

Low Frequencies give us the power or loudness of___

Answer 7

Speech- overall sound is quieter when the lows are not present. UCL changes as well.

Question 8

Positive reinforcement involves

Answer 8

Presenting a tone that is only inaudible without the instrument on

Question 9

Loss of the Ear canal resonance due to the HA or a mold plugging the canal is called what

Answer 9

Insertion Loss which causes the occlusion effect where the Pt’s voice appears louder

Question 10

Sound cannot travel through the following medium or mediums

Answer 10

Vacuum

Question 11

Any complex sound can be broken down into individual frequencies by a technique known as:

Answer 11

Fourier spectral analysis

Question 12

How many octaves occurs from 125 Hz- to 2000 Hz

Answer 12

4 octaves

Question 13

The quality or timbre of a sound is a property that depends on:

Answer 13

How many frequencies are in the complex sound
The relative strength of each frequency
The resonance of the sound cavities

Question 14

The speed of sound in air, in feet per second, is

Answer 14

1100

Question 15

What does the term 67 dB mean?

Answer 15

It is meaningless without a reference level

Question 16

The weakest sound normal human ears can hear in the most sensitive frequency range of the ear is an effective sound pressure of about:

Answer 16

0.0002 dynes/cm2

Question 17

A formant is

Answer 17

A frequency region within a complex tone where certain harmonics have relatively large energy

Question 18

The normal human ear canal resonance is in the approximate range of

Answer 18

2500-4000 Hz

Question 19

The harmonics of speech reinforce some frequencies more others. The reinforced frequencies are:

Answer 19

Formants

Question 20

Vowels differ from consonants in that they

Answer 20

Use more open vocal cord voicing

Question 21

When tilting the frequency response, the last number in a matrix i.e, 110/37/15 means

Answer 21

The 15dB difference occurs between 500 Hz and the first peak

Question 22

The Pt’s MCL on a speech circuit of the audiometer is usually judged on:

Answer 22

The volume at 1000 Hz

Question 23

ANSI developed the articulation index (AI) in express

Answer 23

Speech clarity

Question 24

Positive reinforcement involves

Answer 24

Presenting a tone that is only inaudible without the instrument on

Question 25

Our quest of improving speech understanding begins by studying

Answer 25

Speech production

Question 26

Most auditory systems follow a power law, this logarithmic concept is:

Answer 26

A 10dB increase in sound pressure doubles the loudness

Question 27

Sones compare:

Answer 27

Loudness up frequency

Question 28

Mels measure

Answer 28

Pitch