# Wearable Vibration Based Computer Interaction and Communication System for Deaf
## 4 Experimental Results
Voice was provided at low, normal and high levels and whether our system has perceived correctly or not was tested. Recognition success of the sound without looking at the direction of the source was 100%. It means our system recognized the sounds successfully. When individuals without hearing impairment and hearing impaired individuals were compared, Figure 6 compares deaf individuals with normal individuals and moderate hearing lose individuals. As a result of the application in real-time detection of deaf individuals' direction detection has a success rate of 88%. In Figure 6, the recognition of the sound source's direction for normal people, deaf and moderate hearing lose people is shown. As the number of people with hearing problems is low and the ability to teach them is limited, the normal people's number is higher. However, with proper training the number of people with hearing problems can be increased. As shown in Figure 7 in our system the individual speakers talk in real time and it can be determined if it is a shouting voice or a normal voice. Also, the direction of the shouting person or normal talking person can be determined and the classification succeeded. With this application, \begin{table}
\begin{tabular}{c c c} \hline \hline
**Distance** & **Success Ratio (Loud Sound)** & **Success Ratio (Low Sound)** \\ \hline
1 m & 100\% & 100\% \\
2 m & 100\% & 100\% \\
3 m & 100\% & 100\% \\
4 m & 100\% & 99\% \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Successful perception rate of the voice without considering the distance. Figure 6: Success of deaf, moderate hearing loss and normal people to perceive the direction of voice. This study was tested real time. With the help of program we have written, our wearable system on the individual had 94% Success. In close range, SVM and two of the best feature methods are used and 98% successes are accomplished. By decreasing the noise in the area, the success can be increased. One of the most important problems in deaf is that they could not understand where the voice is coming from. This study helped the hearing impaired people to understand where the voice is coming from real time. It will be very useful for the deaf to be able to locate the direction of the stimulating sounds. Sometimes it can be very dangerous for them not to hear the horn of a car which is coming from their backs. No factors affect the test environment. In real-time tests, deaf individuals can determine direction thanks to our wearable devices. In outdoor tests, a decline in the classification success has been observed due to noise. The vibration-based wearable device we have developed solves the problem of determining the direction from which a voice is coming, which is an important problem for deaf people. A deaf person should be able to sense noise and know its direction in a spontaneous instance. The direction of the voice has been determined in this study and thus it has been ensured that he can senses the direction from which the voice is coming. In particular, voices coming from behind or that a deaf individual cannot see will bother them; however, the device we have developed means that deaf individuals can sense a voice coming from behind them and travel more safely. This study has determined by whether a person is speaking loudly next to a deaf individual. Somebody might increase their tone of voice while speaking to the deaf individual in a panic and therefore this circumstance has been targeted so that the deaf person can notice such panic sooner. The deaf individual will be able to sense whether someone is shouting and if there is an important situation, his perception delay will be reduced thanks to the system we have developed. For instance, the deaf individual will be able to distinguish between a bell, the sound of a dog coming closer, or somebody calling to them; therefore, this can help them live more comfortably and safely with less public stress. In the feedback from deaf individuals using our device, they highlighted that they found the device very beneficial.