The paper presents the results of vibroacoustic investigations and the measurements of the acoustic pressure level (noise) of a transformer model. The measurements were taken at a full transformer load in two operation conditions: at a producer packeted core and at unpacketed core. Unpacketing consisted in loosing the screws pressing the particular core plates. Mechanical vibrations were regist...

Part I describes an intelligent acoustic emission locator, while Part II discusses blind source separation, time delay estimation and location of two continuous acoustic emission sources. Acoustic emission (AE) analysis is used for characterization and location of developing defects in materials. AE sources often generate a mixture of various statistically independent signals. A difficult probl...

in this study, the disadvantages of wood, which is widely employed in producing music instruments, are discussed. for example, high moisture sensitivity, low impact resistance, and time-consuming procedure as well as various properties of different species or in several parts of one specimen which are the main problems of wooden music instruments are extensively discussed in this paper. many ma...

This study aims to evaluate the importance of phonation cues in the acoustic realization of four vocal emotions (happiness, fear, anger, and sadness) in Mandarin Chinese. Our perception experiment confirmed that native listeners could differentiate these emotions. To explain how listeners accomplished the task in the perception experiment, we investigated the acoustic cues used by speakers. An ...

Acoustic noise generated by vessel motion in the test range on a river is the subject of this paper. The hydroacoustic field of the vessel is analyzed using different methods. The analysis was performed in time and frequency domain. The acoustic signals are analyzed using classical concept of the spectral analysis, parametric models of random processes and bispectrum analysis. Particular intere...

An acoustic analysis based on the Ffowcs Williams and Hawkings equation was performed for a high-lift system. As input, the acoustic analysis used unsteady ow data obtained from a highly resolved, time-dependent, Reynolds-averaged Navier-Stokes calculation. The analysis strongly suggests that vor-tex shedding from the trailing edge of the slat results in a high-amplitude, high-frequency acousti...

introduction:although several treatment approaches have been proposed for tinnitus, there are currently no food and drug administration (fda)-approved agents available to treat this condition. in this study, we evaluated the effect of gabapentin on the sensation of subjective tinnitus in patients with acoustic trauma referring to the ear, nose and throat (ent) clinic of taleghani hospital durin...

BACKGROUND neurological dysphonias are normally associated to dysarthrias and play an important role when determining the correct diagnosis. The acoustic analysis of the voice is important for understanding the speech motor disorders present in dysarthric patients. AIM to describe the acoustic and auditory-perceptual characteristics of the voice of the different types of dysarthria. METHOD ...