Alin – Cosmin TOT


26-50 CONTRIBUŢII PRIVIND REALIZAREA UNUI DISPOZITIV DE DETERMINARE A COEFICIENTULUI FONOABSORBANT

CONTRIBUTIONS ON THE DEVELOPMENT OF A DEVICE FOR MEASURING THE SOUND-ABSORBING COEFICIENT
This paper aims to describe fiction and the components of a device for the determination of sound-absorbing coefficient published [1] în the previous edition and essential elements în implementing the architecture processed and acoustic signals analysis undertaken
Keywords: impedance tube, phono-absorbing coefficient, signal analizer

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24-43 DETERMINAREA ATENUĂRII ZGOMOTULUI ÎN CAZUL UTILIZĂRII UNUI PANOU VERTICAL

DETERMINE IF NOISE ATTENUATION USE
A VERTICAL PANEL
This paper presents a taking the case of highway model consists of 4
lanes, avad 3.75 m on each band, two emergency lanes and a 3 m wide range
depasare separation between the meanings of 2.5 m Was defined attenuation
provided by a vertical panel with a height of 2, 2.5, 3 and 3.5 m, mounted on
the edge of highways on the frequency range 62.5 – 500 Hz.
Cuvinte cheie: panou vertical, ecranare acustică
Keywords: vertical panel, acoustic shielding

43 DETERMINAREA ATENUĂRII ZGOMOTULUI


22-30 CONCEPȚIA DISPOZITIVULUI DE DETERMINARE A COEFICIENTULUI FONOABSORBANT AL MATERIALELOR

This paper presents a constructive variant of acoustic impedance tube
used to determine the coefficient of sound absorption materials. This alternative
design brings a contribution in terms of the number of microphones mounted on
the tube impedance control of acoustic vibration generator. The paper contains
and the calibration system of microphones mounted on the device.
Cuvinte cheie: tubul de impedanţă, determinarea erorilor
Keywords: impedance tube, the determination of errors

30 CONCEPȚIA DISPOZITIVULUI DE DETERMINARE