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- W2071765998 abstract "A sewing machine manufacturer came to the College of Engineering of the University of Hartford asking for assistance in quieting their latest model of high-speed industrial sewing machines. When the machine was installed in the anechoic chamber, initial investigations using a precision sound-level meter and weighting networks showed the sound level generally to be in the 90-dB range on the A scale. Measurements were taken at 3 ft. from the unit. Noticeably lower levels were observed in the low-frequency range. Further investigation using a real-time analyzer confirmed the initial observations. Readings were taken around the machine in a hemispherical pattern while the machine was in an anechoic chamber. All data observed on the real-time analyzer was recorded on paper charts for detailed analysis. Testing is incomplete at this point, but predominant frequencies have focused attention on certain drive mechanisms. As extensive redesign is not possible at this stage of the machine's development, only minor modifications will be allowed by the manufacturer. Probe microphones and further frequency analysis will be used to determine if redesign of external linkages will be helpful or not. All possible improvements will be outlined and submitted to the designer for future consideration. These improvements will be reported in this paper. [Student Research Project.]" @default.
- W2071765998 created "2016-06-24" @default.
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- W2071765998 date "1977-06-01" @default.
- W2071765998 modified "2023-09-23" @default.
- W2071765998 title "Industrial sewing machine noise" @default.
- W2071765998 doi "https://doi.org/10.1121/1.2015868" @default.
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