ZigBee Wireless Headphones

Group Members:John Ziegler

Richard Wismer IIIRyan RamdeholWojciech Gajda

OverviewI. Problem StatementII. MicroelectronicsIII. The ZigBee

StandardIV. Client & User

ObjectivesV. Functions of

ZigBee headphonesVI. Alternative

Designs

VII. BluetoothVIII. Final DesignIX. Highlights of

OutcomesX. Features of Final

DesignXI. Headphone

ModuleXII. Conclusion

Problem StatementModern wireless headphones are bulky and

uncomfortableBluetooth is the current standard for data

transmission which is expensive and has high power consumption

MicroelectronicsThe signal will be modified by being

compressed, transmitted, received, filtered and amplified

A transceiver is needed for signal handlingClass D Amplifier

Efficient for power and sized wellFilter Specification

Band Pass Configuration between 20Hz and 20kHz

The ZigBee Wireless StandardA wireless Networking standard based (IEEE

802.15.4) technology designed for low-power and low cost specifications

Global: 2.4GHz 250Kbs ; 16 channelsThe Americas: 915MHz 40Kbs ; 10 channelsEurope: 868MHz 20Kbs ; 1 channelMesh networking: secure, self sustaining,

self configuring, self healing system low power nodes

Wireless range 10 meters

Client & User ObjectivesClient

High profit marginMarketable productReliableCustomer Support from Manufacturer

UserHeadphones with good sound qualityUsabilityLong battery lifeAppropriate pricing

Functions of ZigBee HeadphonesTechnical functions

Attenuate Compress TransmitReceiveFilter DecompressAmplify

Functions to the End UserDeliver reliable sound from an audio device to

headphones wirelessly

Alternative DesignsUsing a different data transmission/network

protocol such as BluetoothBluetooth requires a larger housing to

operateHas a higher power drain on the device being

operatedHigher rangeLarger transfer rate

Bluetooth – Additional Information Bluetooth was created in Sweden and is not a

company its a non profit organizationBluetooth works using a set of universal

protocols rearranged into different profiles ex. File Transfer Profile (FTP). Currently 28 profiles

Bluetooth uses AFH (Adaptive Frequency Hoping ) to communicate with other Bluetooth devices.

Final DesignThe ZigBee protocol was the final choice for

the wireless transmitting standard for audio.CheaperLower power consumptionRange will work for our applicationSmaller

Highlights of the Evaluation Procedure and OutcomesThe ZigBee networking standard is cheaper

to implement than Bluetooth because it has a lower power requirement to work.

Transfer rate of ZigBee: 250 kbps Will have to perform signal manipulation in

order to implement the Zigbee Standard

Features of Final Design

Interface with portable music device

(Hardware, 3.5mm audio jack)

Signal Attenuator(Harware)

Signal Compressor(Hardware)

Microcontroller(Hardware/Software)

ZigBee Transceiver(Hardware)

Power Button(Hardware)

Connect Button(Hardware)

User Inputs

Interface with Headphone

Module

Headphone ModuleInterface to

Headphones(Hardware)

ZigBee Transceiver(Hardware)

Signal Amplifier(Hardware)

Signal Decompressor

(Hardware)

Power Source -Battery

(Hardware)

Microcontroller(Hardware/Software)

Power Button(Hardware)

Connect button(Harware)

Input from User

Interface to PMD Module

(Hardware)

ConclusionThe ZigBee wireless protocol for the use of

short range headphones is ideal when compared to Bluetooth

Low power consumption with a lower transfer rate is better than Bluetooth

Overall, the ZigBee wireless standard is a promising prospect for other design teams.

Questions?