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Clocks

Belongs to:

Home

Synonyms:

Alarm clock, Analog clock, Digital clock, Radio clock

Description:

An alarm clock is a clock that is designed to make a sound, or some other signal, at a specific time to wake somebody or as a reminder. Alarm clocks are powered either by battery or connected to a socket with a cable. Radio clocks can play a radio broadcast or as the case may be a CD instead of preset sounds. Digital clocks have a display instead of an analogue clock face which can show more information and allows a weekday dependent wake-up time.

Due to the operation of the clock face with a motor or AC electronics for complex settings alternating electric and magnetic fields at higher frequency may be emitted.

Type of field:

electric and magnetic

Measurements (acc. to literature)

References

1. Kaune WT et al. (2002): Magnetic fields produced by hand held hair dryers, stereo headsets, home sewing machines, and electric clocks
2. No authors listed (1992): EMF in your Environment: Magnetic Field Measurements of Everyday Electrical Devices
3. Farag AS et al. (1998): Electromagnetic fields in the home
4. Lacy-Hulbert A et al. (1998): Biological responses to electromagnetic fields
5. Preece AW et al. (1997): Magnetic fields from domestic appliances in the UK
6. Hofmann L et al. (2012): [BMU study "Environmental Impacts of 380-Kv-Cables and HVDC-Cables" - Report of the Workgroup on Technology/Economy]
7. Neitzke HP et al. (2006): [EMF manual - Electromagnetic fields: sources, risks, protection]
8. Ainsbury EA et al. (2005): An investigation into the vector ellipticity of extremely low frequency magnetic fields from appliances in UK homes
9. Behrens T et al. (2004): Quantification of lifetime accumulated ELF-EMF exposure from household appliances in the context of a retrospective epidemiological case-control study