Limits of exposure to high‐intensity impulse noise with a 1.5‐ms A duration

1994 ◽  
Vol 95 (5) ◽  
pp. 2862-2862
Author(s):  
James H. Patterson ◽  
Daniel L. Johnson
Keyword(s):  
High Intensity ◽  
Impulse Noise

Effect of High Intensity Impulse Noise on the Vascular System of the Chinchilla Cochlea

1985 ◽  
Vol 94 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Lynn Carlisle Shaddock ◽  
Roger P. Hamernik ◽  
Alf Axelsson
Keyword(s):  
High Intensity ◽  
Impulse Noise ◽  
Vascular System

Removal of high-intensity impulse noise by Weber’s law Noise Identifier

2014 ◽  
Vol 49 ◽  
pp. 121-130 ◽  
Author(s):  
Hussain Dawood ◽  
Hassan Dawood ◽  
Ping Guo
Keyword(s):  
High Intensity ◽  
Impulse Noise ◽  
Weber’S Law ◽  
Weber's Law

Effects of High Intensity Impulse Noise and Rapid Changes in Pressure Upon Stapedectomized Monkeys

1969 ◽  
Vol 68 (1-6) ◽  
pp. 6-13 ◽  
Author(s):  
J. L. Fletcher ◽  
G. D. Roberson ◽  
M. Loeb
Keyword(s):  
High Intensity ◽  
Impulse Noise ◽  
Rapid Changes

HIGH-INTENSITY IMPULSE NOISE: A MAJOR PROBLEM

1964 ◽  
Author(s):  
Robert F. Chaillet ◽  
Georges R. Garinther ◽  
David C. Hodge ◽  
Fred N. Newcomb
Keyword(s):  
High Intensity ◽  
Impulse Noise

Effectiveness of earplugs in high‐intensity impulse noise

1992 ◽  
Vol 91 (3) ◽  
pp. 1677-1689 ◽  
Author(s):  
Armand Dancer ◽  
Paul Grateau ◽  
Alex Cabanis ◽  
Gilles Barnabé ◽  
Gilles Cagnin ◽  
...  
Keyword(s):  
High Intensity ◽  
Impulse Noise

Acoustics 1995: Protection of hearing against high‐intensity impulse noise

1996 ◽  
Vol 99 (1) ◽  
pp. 23-23 ◽  
Author(s):  
James H. Patterson ◽  
Daniel L. Johnson
Keyword(s):  
High Intensity ◽  
Impulse Noise

Adaptive, Noise-Exclusive and Assessment-Based Fuzzy Switching Median Filter For High Intensity Impulse Noise

2015 ◽  
Vol 23 (06) ◽  
pp. 949-963 ◽  
Author(s):  
Saroj K. Meher ◽  
Brijraj Singhawat
Keyword(s):  
High Intensity ◽  
Noise Intensity ◽  
Impulse Noise ◽  
Median Filter ◽  
Sliding Window ◽  
Filtering Method ◽  
Switching Median Filter ◽  
Adaptive Noise ◽  
Image Details ◽  
Made In

The article proposes an adaptive, noise-exclusive and assessment-based fuzzy switching median filter for high intensity impulse noise. The filter adaptively changes the size of sliding window in accordance with noise intensity and noise-exclusive operation is performed only on noise-free pixels. These steps thus preserve the image details effectively. Judicious assessment of the previously restored pixels is made in order to use them in replacing the noisy pixels and further improve the efficiency of filter. With these possibilities, fuzzy switching median filter-based approach is also incorporated for improving the performance. Experimental results justified the efficacy of the proposed fuzzy-based filtering method qualitatively and quantitatively for twelve different highly corrupted noisy images, and showed significant improvement to existing algorithms.

A discussion on the origin and treatment of noise in industrial environments - Deafness due to impulse noise

1968 ◽  
Vol 263 (1142) ◽  
pp. 279-287 ◽  
Keyword(s):  
Steady State ◽  
Short Duration ◽  
High Intensity ◽  
Impulse Noise ◽  
Impulsive Noise ◽  
Physical Characteristics ◽  
International Organization ◽  
Risk Criteria ◽  
New Evidence ◽  
Damage Risk

The evaluation of the hazards to hearing experienced by exposure of the ear to noise has resulted in the specification of the physical characteristics of the noise in terms of damage risk criteria. In the case of steady state and relatively long on-period intermittent noises the researches carried out have resulted in the formulation of many such criteria (Glorig, Ward & Nixon 1962; Burns 1965; C. H. A. B. A. 1965? Kryter, Ward, Miller & Eldredge 1966), the interpretation of which in terms of an internationally agreed standard is at present being undertaken by the International Organization for Standardization (I. S. O.). For exposure to very short duration steady-state noise, for noise superimposed with impulsive components, and for high-intensity impulsive noise, there is little information regarding damage risk. What does exist and the problems associated with the assessment of deafness due to impulse noise will be discussed in this paper. It must be borne in mind, however, that no criterion will clearly demark safety from danger and, being based on the light of the best available knowledge, may be subject to change as new evidence becomes available.

Numerical Investigations of Monopole Impulse Noise

2006 ◽  
Vol 49 (1) ◽  
pp. 53-62
Author(s):  
Kwen Hsu ◽  
Ivanna Malinow ◽  
Songwei Zhang
Keyword(s):  
Shock Wave ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Acoustic Waves ◽  
High Intensity ◽  
Impulse Noise ◽  
Transient Flow ◽  
Near Field ◽  
Blast Waves

Classic theories for linear monopole noise generated by fluid injection have been established and can be found in several literature references. A simple example is the analytical expression of peak sound pressure at far field, which is shown to be proportional to the derivative of the mass flow rate history. However, in cases of high-intensity (impulsive) noise and for near-field regions, these theories become inapplicable. It was found that when the gas injection reached a certain level of intensity, a shock wave could form in the near field and the transient flow field evolved quickly with time. It is well known that a discontinuous mass flow rate history is a feature of a moving shock wave; therefore, the derivatives do not mathematically exist. With the presence of flow discontinuity, a different theory should be established or a different means of study should be used to investigate the properties of monopole impulse noise. By performing direct aeroacoustic simulations, the evolution and propagation of an impulse noise generated by a high-intensity monopole source were numerically investigated. The effects of a few key parameters of the monopole source on the leading pressure wave were determined. It was determined that monopole impulse noise is a physical process sandwiched between the linear acoustic waves generated by a pulsating sphere and the blast waves generated by weapons. Monopole impulse noise involves the degeneration of the shock waves into intense sound waves.

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