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32-89 IMPACTUL COMPUȘILOR ORGANICI VOLATILI ASUPRA MEDIULUI ŞI POSIBILITĂȚI DE REDUCERE PRIN CELE MAI BUNE TEHNICI DISPONIBILE

VOLATILE ORGANIC COMPOUNDS IMPACT ON ENVIRONMENT AND THEIR REDUCTION THROUGH THE BEST AVAILABLE TECHNOLOGIES
This paper presents an analysis of the sources of volatile organic compounds (VOCs) in the atmosphere. VOCs impact on the environment and human health are reported.
In the second part of the paper some possibilities to reduce VOCs are shown, by employing the best available techniques (BATs).
Keywords: volatile organic compounds, best available technologies
Cuvinte cheie: compuși organici volatili, cele mai bune tehnologii disponibile

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32-88 FACTORII CARE INFLUENŢEAZĂ PROPRIETĂŢILE FONOABSORBANTE ALE MATERIALELOR

THE FACTORS THAT INFLUENCE THE SOUND ABSORPTION COEFFICIENT OF MATERIALS
Starting from the premise that the sound absorbing materials are used in almost all domains of activity, we analysed the factors that influence the properties of sound absorbing materials: density, porosity, resistance to airflow, tortuosity, thickness and the placement of material.
Keywords: density, Sound wave absorption, the material structure
Cuvinte cheie: densitatea, absorbţia undei sonoare, structura materialului

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