Midterm Psychophysics

Question 1

Psychoacoustics

Answer 1

Perception of a physical characteristic of sound

Question 2

Method of limits

Answer 2

Tester controls the stimulus
Start above or below the suspected threshold
Based on response inc or dec stimulus

Question 3

Method of adjustments

Answer 3

Subject has control of the stimulus

Bekesy Audiometry- hold button down when hear stimulus & let go when they don’t

Question 4

Method of constant stimuli

Answer 4

Test many trials in random order

Question 5

Masking

Answer 5

The process by which the threshold of one signal is altered by the presence of another signal

Question 6

Monotic

Answer 6

Stimulus going to one ear

Question 7

Diotic

Answer 7

The same stimulus to both ears

Question 8

Dichotic

Answer 8

Both ears being stimulated by different signals

Question 9

What type of masker will mask a HF

Answer 9

LF

Question 10

What type of masker will not mask a LF

Answer 10

HF

Question 11

Critical band

Answer 11

Point at which you can’t mask anymore

Question 12

Psychophysics

Answer 12

Deals with how we perceive stimuli that affects the senses

Question 13

Experiments are set up to narrow down options to answer questions by using…

Answer 13

No open ended questions
Specific stimuli & responses
Only one aspect of stimulus is manipulated
Subject responds in predetermined fashion

Question 14

What 2 things are experiments looking for

Answer 14

Absolute limen

Difference limen

Question 15

Experimenters must distinguish between

Answer 15

What is heard-sensory capabilities

How responses are made- response proclivity

Question 16

Auditory sensitivity

Answer 16

Amount if sound pressure required for a “normal” person to just detect the presence of a stimulus

Question 17

Who created the audibility curve

Answer 17

Sivian & whit 1993

Question 18

Minimum audible pressure

Answer 18

Obtain 0

Measure pressure at drum

Question 19

Minimum audible field

Answer 19

Obtain 0 in soundfield

Measure pressure at drum

Question 20

Missing 6 dB

Answer 20

MAF is more sensitive than MAP by 6 dB

• covering canal for MAP traps LF body sounds
• Pinna and EAC amplifies between 1.6 and 6kHZ with a peak around 3kHz
• 2 ears working together inc sensitivity

Question 21

Upper level of audibility

Answer 21

Intensities in which there are feelings of vibration or pain

Question 22

Tullio

Answer 22

Inc in pressure start pushing on vestibules causing dizziness

Question 23

Terminal threshold

Answer 23

Generally around 130-140 dBSPL

Question 24

Results of Reisz 1928 jnd study

Answer 24

LF jnd= 1-2 dB

HF jnd= 0.1 dB