Data quality has diverse dimensions, from which accuracy is the most important one. cleaning one of preprocessing steps in data mining consists detecting errors and repairing them. Noise a common type error, that occur database. This paper proposes an automated method based on k-means clustering for noise detection. At first, each attribute (Aj) temporarily removed applied to other attributes. ...

Local active sound control can be combined with the remote microphone technique and headtracking for the case when direct measurement of the error signals at a listener’s ears is not possible and the position of the listener’s head is continuously changing. This paper presents the performance of the combined active control system when it is applied to reduce either tonal or broadband random noi...

Residents of major cities of the United Arab Emirates are exposed to multiple noise sources originating from road traffic, aircraft flyovers and various industrial activities. Predicting the contribution of each of these sources to public annoyance, and hence relating it to health effects on residents of these cities, is not an easy task because of the complex nature of these sources and their ...

The eficiency of a Coded Orthogonal Frequency Division Multiplexing (COFDM) receiver can be improved by use of a Pre-FFT equaliser (PFE). This technique is known as combined OFDM-equalisation. This paper considers the noise amplification effect of the PFE and its effect on the performance of a combined COFDM-equalisation modem and proposes a method to improve this performance. This paper first ...

Existing noise reduction techniques for open-fitting hearing aids typically disregard the occurrence of signal leakage through the openfitting, leading to a degraded noise reduction performance. Recent miniaturization advances enable to incorporate an internal microphone in the ear mould, which is able to record this signal leakage. Recently, feedforward and combined feedforward-feedback active...

background : the recognition of road traffic noise as one of the main sources of environmental pollution has led to develop models that enable to predict noise level from fundamental variables. traffic noise prediction models are required as aids for designing roads and highways. in addition, sometimes are used in the assessment of existing or envisaged changes in traffic noise conditions. in t...

In this paper, a simple inverse structure for multichannel active noise control (ANC) is introduced, based on the use of noncausal models of the (pseudo-)inverse plant between the error sensors (typically microphones in ANC systems) and the actuators (typically loudspeakers). This structure, combined with adaptive FIR filters and filtered-x LMS-based algorithms, can produce both a reduction of ...

Occupational exposure to complex blends of organic solvents is believed to alter brain functions among workers. However, work environments that contain organic solvents are also polluted with background noise which raises the issue of whether or not the noise contributed to brain alterations. The purpose of the current study was to determine whether or not repeated exposure to low intensity noi...