Method of predicting Composite Sound Transmission Class rating of composite wall assemblies that do not extend to deck

2018 ◽  
Vol 144 (3) ◽  
pp. 1918-1918
Author(s):  
Steve Pettyjohn
Keyword(s):  
Sound Transmission ◽  
Composite Wall ◽  
Sound Transmission Class

scholarly journals Enhanced speech privacy in office spaces

2018 ◽  
Vol 26 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Alexey Krasnov ◽  
Edward R Green ◽  
Bret Engels ◽  
Barry Corden
Keyword(s):  
White Noise ◽  
Sound Transmission ◽  
Original Signal ◽  
Specific Interest ◽  
Speech Characteristics ◽  
Experimental Parameters ◽  
Sound Transmission Class ◽  
Increasing Demand ◽  
Office Environments

There is an ever-increasing demand for speech privacy in modern office spaces. People prefer their conversations to remain private while not being disturbed by speech of others. The work presented in this article focuses on reducing the intelligibility of the perceived speech by masking the original signal without a significant additional annoyance. The disruption of the information-carrying components of speech by the amplitude and temporal smearing is of a specific interest of this work. We suggest a method in which a modified self-adjusted masking signal is used to effectively counteract the drawbacks of a straightforward reverberation. The presented masking method disrupts key speech characteristics of the original signal. The intelligibility and annoyance levels of the resulting signal are subjectively evaluated. The optimized experimental parameters are reported. The presented method provides a significantly higher speech privacy and a lower perceived annoyance as compared to white noise. The method can be used in office environments with various Sound Transmission Class levels.

Acoustical performance of horizontal-sliding-panel operable partition walls

2021 ◽  
Vol 263 (1) ◽  
pp. 5125-5130
Author(s):  
Jim Borzym
Keyword(s):  
Transmission Loss ◽  
Sound Transmission ◽  
Field Measurements ◽  
Field Conditions ◽  
Sound Transmission Loss ◽  
Airborne Sound ◽  
Partition Walls ◽  
Panel Type ◽  
Sound Transmission Class

Field measurements of airborne sound transmission loss were made on several operable partitions of the horizontal-sliding-panel type between conference rooms. Apparent Sound Transmission Class (ASTC) and Noise Isolation Class (NIC) ratings were computed. Very significant deviation of field-measured sound transmission ratings and manufacturers' Sound Transmission Class (STC) ratings were found. Clients were not satisfied by actual sound isolating performance. Transmission of voice was clearly audible. Some deficiencies of field conditions were found. Some deficiencies of partition installation were found. Modifications were made; acoustical performance did not change significantly.

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