 Hello, my name is Craig. I'm a postdoc at Chris Harrison's future interface group at Carnegie Mellon today I'll be talking to you about LRA or non-contact taptics using synthetic jets So for this work, we took inspiration from LRAs and ERMs two types of haptic actuators that are prolific for contact-based haptics We believe that the reason these devices are so implemented what so widely is because they're inexpensive They're low power. They're low voltage. They're easy to drive and they're easy to feel So we asked ourselves could we make an equivalent type of actuator for non-contact haptics? Our approach is what we call LRA. We use high-interface synthetic jets and these actuators are low voltage They're easy to drive the readily felt Easily made and all you really need is a speaker and a ported enclosure as seen here from the animation on the right We developed the prototype actuator in order to showcase the capabilities of this class of device Our contributions in this work include a design and model optimizing the acoustic resonances of the system Small signal validation of this model Large signal measurements quantifying thrust and flow velocity and a psychophysical measurement showing the low power capabilities of these jets Small signal modeling We developed a multiple domain lumped parameter model Which relates an input voltage to the expected pressure and flow rate of the output port We compared this model with an electrical impedance measurement looking into the system And here we see that the two are in close agreement We also looked at the transfer function of the output port pressure given input voltage Again, we found that our model captures much the behavior of the system large signal measurement For large input voltages the system behaves non-linearly and we quantified this behavior with air velocity measurements taken from a hot wire and a monitor and net thrust force measurements taken from a precision balance We found that thrust monotonically increases as voltage increases and peak thrust occurs around 100 to 200 Hertz as predicted from our small signal model The air velocity also increased with voltage and showed similar behavior as the thrust psychophysics Finally we quantified user perception of the synthetic synthetic jet against their mid palm Subjects placed their palm roughly 25 millimeters away from the jet output And we conducted a detection threshold test in order to find the smallest stimulus that was still haptically detectable Detection thresholds only slightly varied with frequency and we found subjects could detect stimulus Levels as with as little as 20 to 40 milliwatts of input applied power to the system Thank you for your time and see the paper paper for more details