Active noise control systems tend to be designed with a target on sound pressure level reduction. However, the perceived control efficiency for the occupants can be more accurately assessed if psychoacoustic metrics are taken into account. The aim of this paper is to evaluate the effect of an adaptive structural acoustic controller on the sound quality of engine noise in a vehicle mockup. The e...

Sound reflections at building facades are generally calculated applying the mirror image method and therefore it is assumed generally that specular reflections occur. But in many cases of structured surfaces with balconies, jutties and other irregularities these facades are obviously not acoustically plain and therefore diffuse reflections may occur. With financial support by the German BAST (B...

  Background: The sound is an environmental and occupational pollutant and can cause a number of reactions in human body, in which hearing loss is one of the most important effects. Cement industry is one of the industries with noise induced hazards. The aim of this study was to evaluate the noise level in different parts of Kerman Cement Plant.   Materials and Methods: This descri...

Sound pressure level in-situ measurements are sensitive to standing-wave pressure minima and have the potential to result in over-amplification with risk to residual hearing in hearing-aid fittings. Forward pressure level (FPL) quantifies the pressure traveling toward the tympanic membrane and may be a potential solution as it is insensitive to ear-canal pressure minima. Derivation of FPL is de...

Noise is one of the most important sources of pollution in the metropolitan areas. The recognition of road traffic noise as one of the main sources of environmental pollution has led to develop models that enable us to predict noise level from fundamental variables. Traffic noise prediction models are required as aids in the design of roads and sometimes in the assessment of existing, or envisa...

ROC! is a deterministic rewrite strategy language which includes the rewrite rulesas basic operators, and the deterministic choice and the repetition as high-level strategyoperators. In this paper we present a method which, for a given term rewriting system(TRS) R, constructs a new TRS R such that R-rewriting is equivalent (sound and com-plete) with R-rewriting constrained by RO...

OBJECTIVES/HYPOTHESIS To compare hearing measurements made at home using self-administered audiometric software against audiological tests performed on the same subjects in a clinical setting STUDY DESIGN Prospective, crossover equivalence study METHODS In experiment 1, adults with varying degrees of hearing loss (N = 19) performed air-conduction audiometry, frequency discrimination, and sp...

The goal of this study is to investigate the psychophysiological effects traffic sounds in urban green spaces. In a laboratory experiment, psychological and physiological responses four were measured, including road, conventional train, high-speed tram. findings demonstrated that had significant detrimental effects. terms responses, peak sound level outperformed equivalent determining impact so...