- (PDF) Electromagnetic Environments and Health in Buildings | derek clements-croome - okekurywalaf.gq
- Building health: The need for electromagnetic hygiene?
- Electromagnetic environmental compatibility
Language English View all editions Prev Next edition 5 of 5. Other Authors Clements-Croome, D. Physical Description xxiv, p.
(PDF) Electromagnetic Environments and Health in Buildings | derek clements-croome - okekurywalaf.gq
Subjects Buildings -- Safety measures. Electromagnetism -- Environmental aspects. Buildings -- Health aspects. View online Borrow Buy Freely available Show 0 more links Set up My libraries How do I set up "My libraries"?
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Building health: The need for electromagnetic hygiene?
Add a tag. This may include the effect of work equipment and the neighbouring environment on medical implants as well as direct effect on the human body. The Regulations set out a procedure for assessing and controlling risks and include tables of values of electric and magnetic fields at a range of frequencies that should trigger remedial action if exceeded. This includes a list of common home and office electrical equipment that is unlikely to cause any problems.
To understand EMF we should also appreciate two related terms used with electrical equipment and the working environment. Electromagnetic compatibility EMC is the branch of electrical engineering concerned with the unintentional generation, propagation and reception of electromagnetic energy which may cause unwanted effects such as electromagnetic interference EMI or even physical damage in operational equipment.
The goal of EMC is the correct operation of different equipment in a common electromagnetic environment.
These are important for equipment manufacturers, but rarely for facilities managers. This sets the limits of electromagnetic fields to which equipment must be immune.
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If the field exceeds the limits it may interfere with electronic equipment in offices and homes. Electromagnetic fields in the home and workplace must therefore never exceed the limits in this Standard. Wherever electricity is generated, transmitted, or used, electric and magnetic fields are created, due to the presence and motion of electric charges. Generally, these fields vary with time characterized by frequency, phase, direction, and magnitude. Generally it is these varying electric and magnetic fields that may cause concern.
Electromagnetic environmental compatibility
Static electric fields such as the static charge built up by walking on synthetic carpets can sometimes be a problem but they are easily solved by including conductive fibres. Work and home environments are pervaded by varying electric and magnetic fields.
Electric fields depend on voltage so they are most intense around high voltage electrical equipment such as overhead power lines, which may be at as much as kV. The effects of EMF vary with frequency or wavelength. Radio waves are some of the longest wavelengths transmitted through the air, up to several kilometres; a 3km wave is kHz, Longwave radio.
The 2. But EMF generated by power cables represents a much longer wavelength; a 50Hz power cable generates a wavelength of km. The electromagnetic spectrum shows how the EMF generated by different equipment is related.