NDLI: Effect of Frequency on Perception Currents

Content Provider	IEEE Xplore Digital Library
Author	Dalziel, Charles F. Mansfield, Thomas H.
Copyright Year	1884
Abstract	The predominating sensation produced by gradually increasing direct current is warmth in the palm of the hand or wrist. Sensations caused by alternating currents below 10,000 cycles are characterized by a tingling or pricking sensation which is localized in the area adjacent to the point of contact, and at very low frequencies the muscles tend to follow the alternations of the current waveform. For frequencies between 10,000 and 100,000 cycles, the sensations are similar to those at the power frequencies, but they are less intense, and perception occurs over larger areas around the point of contact. An abrupt change in the response occurs between 100,000 and 200,000 cycles when the sensation becomes one of internal heating, and heating is believed to be the only sensation produced by currents in excess of 200,000 cycles. The current required for perception increases with increasing frequency, and between about 1,000 and 100,000 cycles the current is nearly proportional to frequency. Approximately 150 men were used in these investigations and it is believed that a sufficent number were used to permit valid statistical predictions to be made, not only for the particular group tested, but also for a normal cross section of the adult male population of the country.
Starting Page	1162
Ending Page	1168
Page Count	7
File Size	1633749
File Format	PDF
ISSN	00963860
Volume Number	69
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1950-01-01
Publisher Place	New York, U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency Testing Electric shock Injuries Heating Current Low voltage Electrical capacitance tomography Wrist Muscles
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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