scholarly journals Vertical and horizontal thermal structures in the sea : factors affecting underwater sound transmission are measured by use of a towed thermistor chain / E. C. LaFond and K. G. LaFond.

1966 ◽  
Author(s):  
Eugene Cecil LaFond ◽  
K. G. LaFond ◽  
Keyword(s):  
Sound Transmission ◽  
Underwater Sound ◽  
Factors Affecting ◽  
Thermal Structures

scholarly journals Underwater sound transmission through arrays of disk cavities in a soft elastic medium

2015 ◽  
Vol 138 (4) ◽  
pp. 2537-2547 ◽  
Author(s):  
David C. Calvo ◽  
Abel L. Thangawng ◽  
Christopher N. Layman ◽  
Riccardo Casalini ◽  
Shadi F. Othman
Keyword(s):  
Elastic Medium ◽  
Sound Transmission ◽  
Underwater Sound

Incorporation of Nanofiber Layers in Nonwoven Materials for Improving Their Acoustic Properties

2013 ◽  
Vol 8 (4) ◽  
pp. 155892501300800 ◽  
Author(s):  
Amir Rabbi ◽  
Hossein Bahrambeygi ◽  
Ahmad Mousavi Shoushtari ◽  
Komeil Nasouri
Keyword(s):  
Sound Absorption ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Wide Band ◽  
Acoustic Properties ◽  
Sound Insulation ◽  
Sound Transmission Loss ◽  
Factors Affecting ◽  
Nonwoven Materials ◽  
Field Noise

Due to numerous developments in most industries and the increase in the usage of massive and powerful machines in every field, noise has become an unavoidable part of mechanized life and has brought about serious health hazards. The main aim of this work was to investigate the usability of polyurethane and polyacrylonitrile nanofibers for improving sound insulation properties over a wide band of frequencies and reducing weight and thickness of conventional polyester and wool nonwovens. The effect of the number of nanofiber layers and associated surface densities on acoustic properties was investigated. Sound transmission loss and sound absorption analysis using the impedance tube method were carried out as the main factors affecting acoustic behavior of samples. The results show that incorporation of nanofiber layers in nonwoven materials can improve both sound absorption and sound transmission loss simultaneously, especially in mid and lower frequencies, which are difficult to detect by conventional materials.

Sign in / Sign up

Export Citation Format

Share Document