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Articles by Thomas Rindfleisch
An adaptive frequency-hopping detection for slowly-varying fading dispersive channels
Frequency hopping (FH) signals have been widely used to improve performance against frequency selective fading phenomenon of underwater channels. However, the channel is slowly varying in regard to changes in weather conditions, and thus the conventional FH detection transmitting signals with fixed frequency cannot guarantee good detection performance in the dynamic underwater environment.
Acoustic radiation from multilayered materials using the reciprocity principle
Application of the reciprocity principle to evaluate the acoustic radiation from arbitrary multilayered fluid and solid materials is described. To include the effect of shear motion in surrounding media, including viscosity in a fluid, equations for the acoustic radiation from such materials under point force excitation are developed in terms of reflection and transmission coefficients for longitudinal and shear waves.
Linear sweeps and the characterisation of linearly time-varying acoustical systems
Sine sweeps are widely used as test signals in the experimental characterisation of linear and non-linear acoustical systems' responses. One of the reasons for their popularity is that their immunity against time variance is assumed to be superior to that of other types of test signals. This paper explores and quantifies the consequences of linear time variance on the characterisation of acoustical systems with linear sweeps.
Backscatter measurement of cancellous bone using the ultrasound transit time spectroscopy
Recently, ultrasound transit time spectroscopy (UTTS) was proposed as a promising method for bone quantitative ultrasound measurement. Studies have showed that UTTS could estimate the bone volume fraction and other trabecular bone structure in ultrasonic through-transmission measurements.
Acoustic, phonetic, and phonological features of Drehu vowels
Topics Static properties, Phonetics, Human voice, Phonology, Acoustics, Timbre, Consonants, Vowel systems, MATLAB, Discrete cosine transforms In past decades, language descriptions and grammar writing used to include very limited to no phonetic descriptions. Since language endangerment has become a topic of concern, the interest in language documentation has grown (Maddieson, 2002).
Domain-adaptation method between acoustic-response data using different insert earphones
Classifying acoustic responses captured through earphones offers valuable insights into nearby environments, such as whether the earphones are in or out of the ear. However, the performances of classification algorithms often suffer when applied to other devices due to domain mismatches. This study proposes a domain-adaptation method tailored for acoustic-response data from two distinct insert earphone models.
Effect of size on the thermal noise and acoustic response of viscous-driven microbeams
A study is presented of the thermal-mechanical noise and response to sound of microphones that are designed to be driven by the viscous forces in air rather than by sound pressure. Virtually all existing microphone designs are intended to respond to sound pressure. The structures examined here consist of thin, micro-scale, cantilever beams. The viscous forces that drive the beams are proportional to the relative velocity between the beams and fluid medium.
Effects of duty cycle on passive acoustic monitoring metrics: The case of blue whale songs
Long-term fixed passive acoustic monitoring of cetacean populations is a logistical and technological challenge, often limited by the battery capacity of the autonomous recorders. Depending on the research scope and target species, temporal subsampling of the data may become necessary to extend the deployment period.
Investigation on the contribution of swim bladder to hearing in crucian carp (Carassius carassius)
The swim bladder in some teleost fish functions to transfer the sound energy of acoustic stimuli to the inner ears. This study uses the auditory evoked potential tests, micro-computed tomography scanning, reconstruction, and numerical modeling to assess the contribution of the swim bladder to hearing in crucian carp (Carassius carassius).
Talker change detection by listeners varying in age and hearing loss
Despite a vast literature on how speech intelligibility is affected by hearing loss and advanced age, remarkably little is known about the perception of talker-related information in these populations. Here, we assessed the ability of listeners to detect whether a change in talker occurred while listening to and identifying sentence-length sequences of words. Participants were recruited in four groups that differed in their age (younger/older) and hearing status (normal/impaired).
The impact of head-worn devices in an auditory-aided visual search task
Head-worn devices (HWDs) interfere with the natural transmission of sound from the source to the ears of the listener, worsening their localization abilities. The localization errors introduced by HWDs have been mostly studied in static scenarios, but these errors are reduced if head movements are allowed. We studied the effect of 12 HWDs on an auditory-cued visual search task, where head movements were not restricted.
Nonspherical oscillations of an encapsulated microbubble with interface energy under the acoustic field
Spherical instability in acoustically driven encapsulated microbubbles (EBs) suspended in a fluid can trigger nonspherical oscillations within them. We apply the interface energy model [N. Dash and G. Tamadapu, J. Fluid Mech. 932, A26 (2022b)] to investigate nonspherical oscillations of smaller radius microbubbles encapsulated with a viscoelastic shell membrane under acoustic field.
Articulatory and acoustic dynamics of fronted back vowels in American English
Topics Ultrasound, Phonetics, Human voice, Phonology, Acoustics, Consonants, Vowel systems, Organs, Regression analysis, Statistical analysis The fronting of the back vowels /u/, /ʊ/, and /o/ (goose, foot, and goat; Wells, 1982) has been widely observed in global varieties of English, including in North America (Labov , 2006), Britain and Ireland (Ferragne and Pellegrino, 2010), Australia (Cox, 1999), New Zealand (Gordon , 2004), and South Africa (Mesthrie, 2010).
REVIEWS OF ACOUSTICAL PATENTS
Topics Acoustics, Active noise control, Hearing impairment, Microphones, Auditory system, Shock waves, Wave mechanics, Signal processing, Telecommunications engineering, Ferromagnetic materials REETHEE ANTONY, Division of Speech Language Pathology, Binghamton University, 48 Corliss Avenue, Johnson City, NY 13 790 ERIC E.
Guest Opinions: Arguments for and against Santa Clara Valley Water District's Measure S
by Thomas Rindfleisch, Trish Mulvey and Dave Warner / Uploaded: Thu, Oct 15, 2020, 9:38 am 'Yes' on Santa Clara Valley Water District Measure S By Thomas Rindfleisch I was an author of a letter from Crescent Park residents supporting the passage of Measure S referred to in Sue Dremann's recent Palo Alto Weekly article. I continue my strong support. Opponents claim that the remaining seven years of the current Measure B leaves time to complete flood protections.
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