In a prior report (Raju et al., 2023) we concluded that, if the goal was to preserve events such as saccades, microsaccades, and smooth pursuit in eye-tracking recordings, data with sine wave frequencies less than 75 Hz were signal above noise. Here, compare five filters their ability remove We compared proprietary STD EXTRA heuristic provided by our EyeLink 1000 (SR-Research, Ottawa, Canada), Savitzky-Golay (SG) filter, an infinite impulse response (IIR) filter (low-pass Butterworth),...

Carbon nanotube thermophones can create acoustic waves from 1 Hz to 100 kHz. The thermoacoustic effect that allows for this non-vibrating sound source is naturally inefficient. Prior efforts have not explored their true efficiency (i.e., the ratio of total power electrical input power). All previous works used pressure power. A method measurement shown using a fully anechoic technique. True data are presented three different drive signal processing techniques: standard alternating current...

Carbon nanotube (CNT) thin film speakers produce sound with the thermoacoustic effect. Better understanding of physical acoustic properties these will drive future design improvements. Measuring at surface CNT is difficult because films, themselves, do not vibrate, are fragile and have a high temperature. In order to measure particle velocity pressure level (SPL), near field holography (NAH) has been used by employing probe microphones. NAH images quantities source system using set...

The Fourier theorem states that any time-series can be decomposed into a set of sinusoidal frequencies, each with its own phase and amplitude. literature suggests some frequencies are important to reproduce key qualities eye-movements (“signal”) not (“noise”). To investigate what is signal noise, we analyzed our dataset in three ways: (1) visual inspection plots saccade, microsaccade smooth pursuit exemplars; (2) analysis the percentage variance accounted for (PVAF) 1,033 unfiltered saccade...

The Fourier theorem states that any time-series can be decomposed into a set of sinusoidal frequencies, each with its own phase and amplitude. literature suggests some frequencies are important to reproduce key qualities eye-movements ("signal") not ("noise"). To investigate what is signal noise, we analyzed our dataset in three ways: (1) visual inspection plots saccade, microsaccade smooth pursuit exemplars; (2) analysis the percentage variance accounted for (PVAF) 1,033 unfiltered saccade...

In a previous report (Raju et al.,2023) we concluded that, if the goal was to preserve events such as saccades, microsaccades, and smooth pursuit in eye-tracking recordings, data with sine wave frequencies less than 100 Hz (-3db) were signal above noise. We compare 5 filters their ability remove Specifically, compared proprietary STD EXTRA heuristic provided by our EyeLink 1000 (SR-Research, Ottawa, Canada), Savitzky-Golay (SG) filter, an infinite impulse response (IIR) filter (low-pass...

Osteoarthritis (OA) is a dehabilitating condition that highly prevalent in today’s society, frequently leading to knee replacement. OA characterized by loss of articular cartilage. Previous research has shown cartilage preservation dependent on the structural integrity menisci [1, 2]. The human are two crescent shaped fibrocartilaginous structures provide fundamental load distribution within joint, ultimately aiding attenuate stresses at tibio-femoral site [3–5].

Carbon nanotube (CNT) loudspeakers are modern thermoacoustic speakers. Their extreme light weight, lack of moving parts, and geometric flexibility provide the engineering community an exciting new tool in their sound generation toolbox. Prior to this study, no effort has been made understand subjective performance. All data literature objective metrics, e.g., pressure, power, total harmonic distortion, etc. This uses a hybrid paired comparison modified rhyme test jury study compare multiple...

Developing consumer products requires consideration of product noise. Product noise control is usually not as simple measuring and reducing the sound pressure level much possible. For example, consumers will purchase vacuum cleaners if they are too quiet because a perception that do function well louder models. This demonstration uses three countertop blenders to teach students about subjective acoustics jury studies. The start with blind acoustic comparison audience be asked for opinions on...

In 1993, Stampe [1993] suggested two "heurisitic" filters that were designed for video-oculography data. Several manufacturers (e.g., SR-Research, Tobii T60 XL and SMI) have employed these as an option recording eye-movements. For the EyeLink family of eye-trackers, are referred to standard (STD) or EXTRA. We implemented software functions. those who use their eye-trackers data-collection only, this will allow users collect unfiltered data simultaneously access unfiltered, STD filtered EXTRA...