The relationship between floor vibration from an underground source and the airborne sound pressure level in the room

2016 ◽  
Vol 4 (4) ◽  
pp. 247-255 ◽  
Author(s):  
Rupert Thornely-Taylor
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Pressure Level ◽  
Airborne Sound ◽  
Floor Vibration ◽  
The Relationship

Loudness of Structure-Borne Sound Heard Directly by Ear Put on Vibrating Structure

2003 ◽  
Vol 22 (1) ◽  
pp. 27-32
Author(s):  
Takuya Fujimoto
Keyword(s):  
Sound Pressure Level ◽  
Contact Surface ◽  
Vibration Amplitude ◽  
Sound Pressure ◽  
Pressure Level ◽  
Vibration Velocity ◽  
The Relationship ◽  
Velocity Level

Putting an ear close to a vibrating structure like a wall or a floor, we are able to hear structure-borne sounds clearly, but the loudness of such sounds has never been studied quantitatively. In this study, subjective experiments were carried out in order to obtain the relationship between loudness and the vibration amplitude of the ear's contact surface at low audible frequencies. The main result of this study is that the loudness of a structure-borne sound is almost equal to that of an air-borne sound with a sound pressure level 20 dB higher than the vibration velocity level (ref=5×10−8 m/s) of the surface. According to this result, the loudness of the structure-borne sound heard directly can be evaluated as a sound pressure level derived from the measured vibration amplitude of the structure.

The Relationship Between Nasal Sound Pressure Level and Palatopharyngeal Closure

1969 ◽  
Vol 12 (1) ◽  
pp. 193-198 ◽  
Author(s):  
Ralph L. Shelton ◽  
William B. Arndt ◽  
Albert W. Knox ◽  
Mary Elbert ◽  
Linda Chisum ◽  
...  
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Correlation Coefficients ◽  
Pressure Level ◽  
The Difference ◽  
The Relationship

A group of 21 subjects with well-fitted speech bulbs was compared for nasal sound pressure level (SPL) with a group of 13 subjects having moderate deficiency of palatopharyngeal closure. The difference in mean measures for the two groups was statistically significant. Correlation coefficients are reported for the relationships between nasal SPL and both a cinefluorographic measure of palatopharyngeal closure and several articulation measures.

Estimation of Acoustical Performance of Floating Floors from Dynamic Stiffness of Resilient Layers

2005 ◽  
Vol 12 (2) ◽  
pp. 99-113 ◽  
Author(s):  
Alessandro Schiavi ◽  
Andrea Pavoni Belli ◽  
Francesco Russo
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Dynamic Stiffness ◽  
Damping Ratio ◽  
Pressure Level ◽  
International Standard ◽  
And Performance ◽  
The Impact ◽  
The Relationship ◽  
Over Time

This paper describes a procedure for evaluating the reduction in impact sound pressure level of floating floors by measuring the apparent dynamic stiffness of the resilient layer, according to International Standard EN 29052-1. The impact sound pressure level experimental data, obtained according to International Standard UNI EN ISO 140-8, was compared with estimates obtained from dynamic stiffness measurements. Results confirm the effectiveness of the empirical model. Two questions are addressed. The first concerns the decrease in layer thickness over time. The second concerns the relationship between damping ratio and performance.

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