HEARING AID HEURISTICS ANALYSIS

• Objective: To conduct usability and human factors testing on hearing aid device to assess if the required specifications are met.

• Specifications :Spec # Source Specification

Direction

Units of measure Marginal Ideal Notes DRI

S9

CN2, CN4, CN11

Range of adult ear size accommodated

max percentile25th to 75th

10th to 90th

Use ANSUR database to obtain dimensions corresponding to theses percentiles

ISE

S10

CN4, CN6, CN10, CN11

Weight of earpiece min g <15 <12marginal values will depend on ergonomic info

ISE

S14 CN3

Percent of surveyed people who identify a picture of the device as something other than a hearing aid.

max percent >60 >80team should conduct surveys

ID

S15 CN3

Percent of surveyed hard of hearing people who prefer the form of the new device to standard behind the ear hearing aids

max percent >50 >75team should conduct surveys

ID

S16 CN3

Percent of surveyed hearing people who would use the device for Bluetooth or music listening

max percent >50 >70team should conduct surveys

ID

S17 CN11

Percent of surveyed people who feel the device is comfortable to wear

max percent >60 >80team should conduct surveys

ID

Specifications 9, 10• Range of adult ear size accommodated

• Final design will be measured to ensure dimensions fall with in the 5%-95% percentile

• Weight of earpiece• Final prototype will be weighed to ensure it’s weight is below 15

grams

SPECIFICATIONS 14-17 Two Surveys:• Small Group • Imagine-RIT

Small Group Survey• Small heuristics study of 5-6 students between the ages

of 18-25• Evaluators can be either Hearing or Hard of Hearing

students• Incentive for participating in survey will be granted to

evaluators (Javas Tokens)• Data collected will be confidential

Procedure• Conduct one on one interview with each participant for a

maximum of 20 minutes• Each participate will be ask to wear a non-functional

prototype and perform a set of tasks such as walking with device, adjusting volume etc.

• A Likert system will be used to rank satisfaction of each question

ImagineRIT Survey • ImagineRIT visitors who are at least 18 or older will be

allowed to participate in this survey • Each participate will be ask to wear a non-functional

prototype and perform a set of tasks such as adjusting volume/profiles etc.

• A Likert system will be used to rank their response for each question.

Survey Questions• Each question will reference a function on the device to

evaluate basic usability standards:• Flexibility and efficiency of use• Aesthetic and minimalist design • User Control and freedom • Recognition rather than recall

Sample Questions

Please mark how satisfied you are with the hearing aid device for each situation:• Overall comfort/fit

• Very satisfied, Satisfied, Neutral, Dissatisfied, Very Dissatisfied

• Ease of adjusting volume• Very satisfied, Satisfied, Neutral, Dissatisfied, Very Dissatisfied

• Visibility of hearing aid• Very satisfied, Satisfied, Neutral, Dissatisfied, Very

Dissatisfied

Statistics For Analyzing Data

Ordinal data:• α= 0.05• Frequency Distribution/Cross Tabulation• Kendall tau B or C• Chi-square test