We introduce the equivalent noise level (ENL) as a strongly robust complexity parameter. It combines the permutation largest slope entropy (PLSE) for the analysis of the regularity of any type of time series and the differential dynamical quantization (DDQ) for noise reduction. Simulation results attest the efficiency of the ENL for complexity analysis of noisy series of observations.

background: sound produced by the passing traffic contributes to noise pollution. noise pollution affects the residents of both city and suburban areas. the noise produced does not only disturb the community living nearby the main road during the day but becomes worse during the night. the purpose of the study is to perform noise level measurement and subjective evaluation on the noise produced...

  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...

background : the goal of the present study was to develop and validate the persian version of the acceptable noise level (anl) test in normal, persian-speaking children aged 5-8 years. methods : this tool-making and non-experimental research was conducted in two stages. in the first stage the proper story was selected and recorded after evaluation of its content validity. in the second stage th...

in recent years, need to increase the convenience of trips in railway vehicles causes that train operators and manufacturers focus on reducing the noise level which is sensed by passengers. in this paper, first the state of modeling acoustic noise in cab train is discussed and natural frequencies and acoustic mode shapes are derived and then formulation of acoustic pressure in the cab will be o...

background: in the steel industry, coke-fueled furnaces are used for smelting iron ore to produce cast iron are considered as sources of annoying noise.this study aims to evaluate the noise pollution blast furnace and sound source characteristics in order to present noise control measures in the steel industry. methods: measurement of noise level and its frequency analysis was performed using s...

background: noise-induced hearing loss (nihl) is one of the most common occupational illnesses. most of the studies on nihl were conducted at high noise levels that people are rarely exposed to but in industries. the function of the outer hair cells (ohcs) is impaired after exposure to industrial noise. distortion product otoacoustic emissions (dpoaes) are useful in examination of noise-induced...