Project
| # | Title | Team Members | TA | Documents | Sponsor |
|---|---|---|---|---|---|
| 63 | Molar Affixed Bone Conduction Speaker for Discreet Communication |
Arya Nallanthighall Raahim Azeem Yash Khatavkar |
Vishal Dayalan | design_document1.pdf final_paper1.pdf photo1.jpg photo2.JPG presentation1.pdf proposal2.pdf |
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| # Molar Affixed Bone Conduction Speaker for Discreet Communication Team Members: - Yashak2 - bharath4 - raahima2 # Problem Discrete forms of communication have historically been incredibly useful in reconnaissance and military applications. Outside of small earpieces that are externally visible, there are not many solutions for communication that are undetectable from the perspective of an external viewer. Currently, bone conduction speakers are used in some hearing aids to bypass the ear in those that are hard of hearing. However, the audio signal output to the listener might not provide realistic audio, failing to supply spatial cues to the listener. # Solution Therefore, to address this problem, we propose a wearable bone conduction speaker affixed to the molar of the user which transmits audio via vibrations to the jawbone. To address this problem, we propose augmenting ear wearable hearing aids with in mouth wearable bone conduction speakers, providing another source of audio for the listener to spatialize the input audio. Describe your design at a high-level, how it solves the problem, and introduce the subsystems of your project. # Solution Components NFMI RECIEVER-NxH2280/81/6 or SPIRIT1QTR ATTINY85-20SU Microcontroller 3V3 Battery U4 LM4864MM ## Communication This subsystem is responsible for receiving the audio signal. We will either have a Near Field Magnetic Induction (NFMI) receiver or a Bluetooth receiver fixed in the mouth. This component will be connected to the AT microcontroller, where we will be able to configure the receiver during usage, for example, changing the receiving frequency, or changing the bluetooth pair. The microcontroller will then output this signal to the amplifier subsystem. NFMI RECIEVER-NxH2280/81/6 or SPIRIT1QTR ATTINY85-20SU Microcontroller 3V3 Battery ## Amplifier This subsystem is responsible for the amplification of audio signals which are to be sent to the transducer. U4 LM4864MM ## Transducer Finally. the transducer will receive the audio signal from the amplifier unit and converting them into small expansions and contractions of the magnetic coil in the Bone Conduction transducer. These vibrations will then be intelligible to the user as audio. RC-BC29 or Toothtune transducer(model number unknown but is found inside vintage toothtune brushes of the 2000’s) # Criterion For Success Since the premise of the project is a development of an incredibly discrete communication system our goals would be the following, Transducer must be able to vibrate resonant material, i.e., aluminum, before testing in mouth Be able to communicate to the user without indicating that such communication is taking place to external reference frames. The entire device should be comfortable for the user to wear and not an impairment for normal speech. If these two criteria are fulfilled the unit should be comfortable and low maintenance to wear and operate. #Safety As this is an in mouth wearable, safety is of utmost importance in the development process. There will be meticulous care taken in the development in this product so that we do not run the risk of hurting ourselves. First, the components of the circuit will all be chosen for low current, low power operation, thus limiting the power consumption of the wearable. Second, before fitting into the mouth, we will do extensive testing of the system on resonant material outside the mouth, creating a safe testbench for our project. Finally, great care will be taken in insulating each our our components by a) building a insulating chassis, and b) using insulating glue like Sugru to ensure that the user will not be shorted by any loose circuitry. |
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