Schlieren optical filtering for sound‐intensity measurements

1980 ◽  
Vol 67 (6) ◽  
pp. 2106-2107
Author(s):  
L. Carpenedo ◽  
P. Ciuti ◽  
G. Iernetti
Keyword(s):  
Sound Intensity ◽  
Optical Filtering ◽  
Intensity Measurements

New Toothed Belt Matches Various Pulley-Profiles

2000 ◽  
Author(s):  
Frank H. Schaefer
Keyword(s):  
Sound Intensity ◽  
Belt Drive ◽  
Special Test ◽  
Intensity Measurements ◽  
Test Conditions ◽  
Toothed Belt ◽  
Quality Of Motion ◽  
Center Distance ◽  
Dynamometer Test

Abstract This paper examines the possibility of a new toothed belt construction to run in various pulley-types. The measurements from a laboratory dynamometer test stand show the belt life under special test conditions by use of HTD-, STPD- and RPP-pulleys, each with an angle of wrap of 180°. In case of locked center distance the increase of torque causes tooth climbing until belt jumping occurs. The pretension was brought into line with the torque each time the torque was increased and the jumping limit torque was determined. From literature it is expected that the results for the behavior of the HTD- and the RPP-pulley are similar. Another parameter to describe the quality of motion is the noise. Here sound power is a very effective descriptor of how noisy an object is. It was determined from sound intensity measurements for HTD- and STPD-pulleys. The ratio of the toothed belt drive used for the noise measurement was 0.63.

Sound intensity measurements in vehicle interiors

2012 ◽  
Vol 132 (3) ◽  
pp. 1984-1984 ◽  
Author(s):  
Svend Gade ◽  
Jo/rgen Hald ◽  
Jakob Mo/rkholt
Keyword(s):  
Sound Intensity ◽  
Intensity Measurements
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