A point FFT for all ten channels, although only the lower ten values are used representing the acoustic power from 0Hz to Hz , yields features. Brute force machine learning approach is employed, computing features in total, many of which are derived combinatorially. Skinput leverages the natural acoustic conduction properties of the human body to provide an input system, and is thus related to previous work in the use of biological signals for computer input. In addition to the energy that propagates on the surface of the arm, some energy is transmitted inward, toward the skeleton Figure 3. While we do not explicitly model the specific mechanisms of conduction, or depend on these mechanisms for our analysis, we do believe the success of our technique depends on the complex acoustic patterns that result from mixtures of these modalities.

The amplitude of these ripples is correlated to both the tapping force and to the volume and compliance of soft tissues under the impact area. In particular, resolves the location of finger tips on the arm and hand by analyzing mechanical vibrations that propagate through the body. The highly discrete nature of taps i. It should be noted, however, that other, more sophisticated classification techniques and features could be employed. Thus, features are computed over the entire input window and do not capture any temporal dynamics.

In general, tapping on soft regions of the arm creates higher amplitude transverse waves than tapping on boney areas e. Iese we will describe the Skinput sensor and the processing techniques we use to segment, analyze, and classify bio-acoustic signals. However, there is one surface that has been previous overlooked as an input canvas and one that happens to always travel with us our skin.

ieee research paper on skinput technology

However, tables are not always present, and in a mobile context, users are unlikely to want to carry appropriated surfaces with them at this point, one might as well just have a larger device. These are normalized by the highest-amplitude FFT value found on any channel.

Skinput: appropriating the body as an input surface

We conclude with descriptions of several prototype applications that demonstrate sinput rich design space we believe Skinput enables. This is an attractive area to appropriate as it provides considerable surface area for interaction, technologg a contiguous and flat area for projection. Last but not the least, I acknowledge my friends tcehnology their contribution in the completion of the seminar report. Thus, features are computed over the entire input window and do not capture any temporal dynamics.


The primary goal of Skinput is to provide an always available mobile input system that is, an input system that does not paer a user to carry or pick up a device. Similarly, we also believe that joints play an important role in making tapped locations acoustically distinct. We assess the capabilities, accuracy and limitations of our technique through a two-part, twenty-participant user study. To capture this acoustic information, we developed a wearable armband that is non- invasive and easily removable.

Remember me on this computer. Ramchandra, Head of the Department, for giving me a chance to present this seminar.

Ieee research paper on skinput technology – Google Docs

In this section, we discuss the mechanical phenomenon that enables Skinput, with a specific focus on the mechanical properties of techmology arm. Furthermore, proprioception our sense of how our body is configured in three-dimensional space allows us to accurately interact with our bodies in an eyes-free manner.

These are fed into the trained SVM for classification.

This is almost certainly related to the acoustic loss at the elbow joint and the additional 10cm of distance between the sensor and input targets. This reduced sample rate and consequently low processing bandwidth makes our technique readily portable to embedded processors. To overcome these challenges, the idea of a single sensing element with skinpkt flat response curve, to an array of highly tuned vibration sensors was dropped. Finally, our sensor design is relatively inexpensive and can be manufactured in a very small form factor e.

ieee research paper on skinput technology

Some energy is radiated into the air as sound waves; this energy is not captured by the Skinput system. We tuned the upper sensor package to be more sensitive to lower frequency signals, as these were more prevalent in fleshier areas.


ieee research paper on skinput technology

Since we cannot simply make buttons and screens larger without losing the primary benefit of small size, we consider alternative approaches that enhance interactions technoogy small mobile systems. There has been less work relating to the intersection of finger input and biological signals. We collect these signals using a novel array of sensors worn as an armband.

In pwper, when placed on the upper arm above the elbowwe hoped to collect acoustic information from the fleshy bicep area in addition to the firmer area on the underside of the arm, with better acoustic coupling to the Humerus, the main bone that runs from shoulder to elbow. This approach provides an always available, naturally portable, and on-body finger input system.

An average of these ratios 1 feature is also included. I also do not like to miss the opportunity to acknowledge the contribution of all dignitary Staff-members of Nalla Malla Reddy Engineering College for their kind assistance and cooperation during the development of my Seminar report. In contrast, brain signals have been harnessed as a direct input for use by paralyzed patients, but direct brain computer interfaces BCIs still lacks the bandwidth required for everyday computing tasks, and require levels of focus, training, and concentration that are incompatible with typical computer interaction.

(DOC) SKINPUT TECHNOLOGY | Sai Dheeraj Reddy –

Other approaches have taken the form of wearable computing. This is not surprising, as this condition placed the sensors closer to the input targets than the rewearch conditions. When shot with a high- speed camera, these appear as ripples, which propagate outward from the point of contact see video.