Ultrasonic noise from manmade electical devices

Measurements of ultrasonic noise emitted from manmade electrical devices have been made in an ultrasonic anechoic chamber. Until now, little has been published about the levels and frequency content of ultrasonic noise emitted from electronic devices such as laptops, cell phones, and other electroni...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2010-03, Vol.127 (3_Supplement), p.1882-1882
Main Authors: Jenny, Trevor, Anderson, Brian E., TenCate, James A.
Format: Article
Language:English
Online Access:Get full text
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Summary:Measurements of ultrasonic noise emitted from manmade electrical devices have been made in an ultrasonic anechoic chamber. Until now, little has been published about the levels and frequency content of ultrasonic noise emitted from electronic devices such as laptops, cell phones, and other electronic devices. The most common source of ultrasonic noise in these devices is dc to dc power supplies. Measurements are made over the range of 20–200 kHz emitted by electronic devices (e.g., laptops). The results of these measurements and the challenges associated with making the measurements will be discussed (including anechoic chamber qualification in the ultrasonic frequency range). [This work has been funded by the Los Alamos National Laboratory.]
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3384678