Purpose The purpose of this study was to determine the validity of preliminary reports showing that glottal aerodynamic measures can identify pathophysiological phonatory mechanisms for phonotraumatic and nonphonotraumatic vocal hyperfunction, which are each distinctly different from normal vocal function. Method Glottal aerodynamic measures (estimates of subglottal air pressure, peak-to-peak...

OBJECTIVES This case-control designed field study examines the vocal behavior in teachers with self-estimated voice problems (VP) and their age- and school-matched voice healthy (VH) colleagues. It was hypothesized that teachers with and teachers without VP use their voices differently regarding fundamental frequency, sound pressure level (SPL), and in relation to the background noise. METHOD...

OBJECTIVE To elucidate capabilities and limitations of the VocaLog, a device marketed to log-calibrated dB sound pressure level (SPL). STUDY DESIGN The study design varied depending on the experiment. All were prospective. Some were case series, and others were cohort studies without controls. METHOD Experiments were conducted to determine (1) whether the VocaLog logged phonatory activity a...

Equivalent sound level (Leq), sound pressure level (SPL), and fundamental frequency (F0) are analyzed in each of five Kunqu Opera roles, Young girl and Young woman, Young man, Old man, and Colorful face. Their pitch ranges are similar to those of some western opera singers (alto, alto, tenor, baritone, and baritone, respectively). Differences among tasks, conditions (stage speech, singing, and ...

Tread design has evolved over the years to achieve the common tread pattern used in current vehicles. However, to meet safety and comfort requirements, tread design considers more than one design factor. Tread design must consider the grip and drainage, and the manner in which to reduce rolling noise, which is one of the main factors considered by manufacturers. The main objective of this study...

Exposure amplitude and repetition affect bottlenose dolphin behavioral responses to simulated mid-frequency sonar signals" (2013). a b s t r a c t a r t i c l e i n f o Keywords: Acoustic exposure Behavioral response Bottlenose dolphin Dose–response Sound Thirty bottlenose dolphins (Tursiops truncatus) participated in a controlled exposure study using an acoustic stimulus that consisted of a si...

Measurements of middle ear (ME) acoustic power flow and related measures (e.g., reflectance, absorbance, impedance, resistance, and reactance) have several important advantages over other measures of acoustic impedance, such as the clinical “gold standard” measure, tympanometry. In addition to its wide bandwidth and ease of use, the absorbance curve, on a dB scale, has a shape that is similar t...

Psychoacoustic methodologies were investigated and applied to a case study within a cooperation project of the University of Pisa and Magna Closures S.p.A. mainly focused on the acoustics of power windows. The project included tests on closing-opening event sequences of the power window rail, to evaluate the component noise. Different trials were performed varying the test conditions. Time-freq...

OBJECTIVES/HYPOTHESIS Fundamental frequency (F0) and intensity sound pressure level (SPL) of voice are controlled by intrinsic laryngeal muscle (ILM) activation and subglottal pressure (Psub). Their interactions were investigated. METHODS In an in vivo canine model, the thyroarytenoid (TA), lateral cricoarytenoid/interarytenoid (LCA/IA), and cricothyroid (CT) muscles were independently activa...

The effect of massage on voice fundamental frequency (F(0)) and sound pressure level (SPL) was investigated. Subjects were recorded while reading a 3-min passage of prose text. Then, a 30-min session of massage was administered by a trained naprapathy therapist. Sixteen subjects were given the massage, while 15 controls rested, lying down in silence for the same amount of time. The subjects wer...