Transcript Faculty Advisor - ECpE Senior Design

Team Members:
Client: Herb Harmison
2692 Meadow Glen Road
Ames, IA 50014
Hassan Qureshi
CprE
Hamdan Al-Mehrezi
CprE
Trong Do
EE
Nathan Veen
EE
Faculty Advisor: Edwin Jones Jr.
Introductory
Proposed Approach and Considerations
Abstract
Proposed Approach
Advancements in circuit design and electrical devices, like microphones, have molded modern
hearing aids to become smaller and better attuned to an individual’s needs. Along with these
advancements has come a hefty price to pay for hearing aids. Many people cannot afford the
high cost of these devices and will struggle through life trying to hear the noises around
them. Many people also shy away from hearing aids because society today views them as a
major fault unlike eyeglasses. Producing an effective, acceptable, and inexpensive hearing aid
is the goal of this design team. The hearing aid device will resemble that of a CD player or a cell
phone with a wire connect earpiece and microphone, devices that are accepted in our society
today. The approach will be to first design the necessary circuit, then to test the circuit and
implement a design to coincide with standards in today’s society. The hearing aid device will
help many who struggle with hearing loss because they cannot afford the cost of advanced
hearing aid devices.
Problem Statement
Develop a hearing aid device that is affordable and fashionable by understanding the
functionality of the ear and integrating components to produce great sound and look good.
• Research, test, and integrate components in design
• Design a prototype and test
• Analyze feedback from faculty advisor and client
• Develop end product
Technologies Considered
• Use two microphones to create stereo sound
• Design amplifier to cutoff the noise and distortions to
,.increase sound quality
• Use analog circuit
• Use AutoCAD to make a circuit board and the main
.,unit
Testing Considerations
Operating Environment
• Testing the gain at a particular input signal
• Indoor and outdoors
• Testing the output signal
• Typical weather conditions found in Midwest
• Client demonstration testing
• Should not be dropped or thrown
Figure 2. Sample hearing aid device that
Intended User(s) and Use(s)
shows the basic components and operation
• Men and women of any age who have experienced noticeable hearing loss
• Improve performance of an individual’s hearing in several environments
Estimated Resources
Assumptions
• Wires connect headphone and microphone to the main unit
Personnel Effort
• User can adjust volume, frequency response, and microphone levels
Limitations
Required Resources
Qureshi, Hassan
25%
A K A AL-Mehrazi,
Hamdan
25%
Printing of Project Poster
11%
• Cost in the range of $100 - $200
• Weight of main unit is less than 5 oz.
Veen, Nathan Cory
26%
Headphone (2)
Amp (2)
8%
Cory,
Do Trong
Do Trong
Expected End Product
37%
5%
Qureshi, Hassan Javed
Veen, Nathan Cory
Do Trong
24%
Microphone (2)
8%
Batteries
A K A AL-Mehrazi, Hamdan
8%
• Main unit with circuitry, controls, and battery
Hearing aid case
23%
Sw itches (3) including
selector sw itch
• Microphones attached to clothing
• Headphones designed to attach to eyeglasses
Figure 3. Personnel effort
Figure 4. Required resources
• User’s manual with instructions, technical support and specifications
Project cost ( parts, labor & total)
$6,000.00
$5,081.00
$5,000.00
Cost
$4,000.00
Figure 1. Block diagram for hearing aid operation
$3,000.00
$2,000.00
$1,265.00
$1,210.00
$1,265.00
$1,210.00
QU R ESH I
VEEN N ATH AN
D O TR ON G
H AMD AN A K A
H ASSAN
C OR Y
C OR Y
AL-MEH R EZ I
$1,000.00
$0.00
Tot al
J AVED
Project Requirements
Figure 5. Project Cost
Design Objectives
• Dependable and easy to use
• Design a compact and low cost solution
Schedule
• Battery power system
Functional Requirements
• Amplify normal sound to a level appropriate for user
• Controls on main unit used to adjust volume, microphone intensity, and frequency response
Design Constraints
• Size limitation of main unit of 5 x 2 x 1 inches
• Weight limitation of main unit of 5 oz.
Figure 6. Project Schedule
• Stereo sound with fashionable design
Measurable Milestones
• Technology Considerations and selection
• Develop a working circuit
• Build main unit to incorporate circuit and be fashionable
• Develop design to connect headphones and microphones
• End product testing and demonstration
Closing Summary
Currently, over 28 million Americans are hearing impaired. The solution to this impairment is
to use some hearing aid device that helps them understand surroundings better. Due to
advancements in technology, many people cannot afford the high cost of state-of-the-art
hearing aids. By that reason, the team will develop another way to design a new modern
hearing aid, which has the quality sound at a lower cost. The design will have good sound
quality that is adjustable to meet the needs of each individual user with a nice shape that
people can hide and be comfortable wearing.