Hearing science exam 3

What is the method of constant stimuli

A set of stimulus intensities presented in random order and the patient says whether thry detect it or not each time

The method of constant stimuli is the most _________ but also the most __________

Accurate, time consuming

What is this figure called

Psychometric function

what does the data in a psychometric function used to generate threshold tell us about behavioral thresholds

They are arbitrary- they are decided at random

What is the method of limits

Stimuli presented in ascending or descending order until the persons response changes

Key points of the method of limits

- systematic order

- faster than method of constant stimuli

What is the threshold for method of limits

Average of the points where response changes

What is the threshold for method of constant stimuli

Intensity detected 50% of the time

What can using the method of limits cause

Anticipation- person predicts when the stimulus will change

What does this picture show

Method of limits- intensity and transition points

What are transition points

Where the response changes from either yes or no

What is the method of adjustment

The participant controls the stimulus intensity and adjusts it until it is just barely detectable

What are the key points for the method of adjustment

- fastest method

- Least accurate

- anticipation occurs

How do you find the threshold for the method of adjustment

Average of several adjusted settings

What does this picture show

Method of adjustment

What is a hearing threshold

Softest sound a person can detect at least 50% of the time- combo of method of constant stimuli snd method of limits

What are behavioral thresholds influenced by

Sensitivity and response bias

What is the clinical method of obtaining threshold

Down 10 every time they respond yes and up 5

What is a hit

Responding when a stimulus is presented

What is a false alarm

Responding when a stimulus not presented

What is a miss

Not responding when stimulus presented

What is correct rejection

Not responding when a stimulus is not presented

true or false: the field of psychoacoustics examines how we perceive sound

true

true or false: anticipation occurs when the listener is expecting a stimulus to occur

true

describe backwards masking

- nonsimultaneous

- signal presented before masker

describe forward fringe masking

- simultaneous

- masking presented before signal

describe backward fringe masking

- simultaneous

- masker presented before signal

behavioral thresholds are influenced by ______ and _____

sensitivity, response bias

if threshold= 5 dB and masker = 45 dB, what is the amount of masking?

40 dB

clinical method of obtaining threshold uses these 2 methods:

1. method of constant stimuli

2. method of limits

define interaural attenuation

the reduction of sound intensity as it crosses the head

what is the purpose of masking

to prevent the hearing sound intended for the test ear, ensuring accurate, ear specific hearing thresholds.

describe forward masking

- nonsimultaneous

- masker before the signal

For the Method of Constant Stimuli random presentation of signals are used

true

For the Method of Adjustment random presentation of signals are used

false

Name A

Backwards Masking

Name B

Forward Fringe Masking

Name C

True Simultaneous Masking

Name D

Backward Fringe Masking

Name E

Forward Masking

Which type of masking is the best?

True Simultaneous (C)

What does this chart show?

Method of Constant stimuli