Why should researchers use caution when accessing information from Wikipedia, online forums, and blogs?"

researchers should use caution when accessing information from Wikipedia, online forums and blogs.

In conducting research for homework or an academic paper, you are basically conducting a search for facts: little tidbits of truth that you will assemble and arrange in an organized fashion to make an original point or claim. Your responsibility as a researcher is to understand the difference between fact and fiction, as well as the difference between fact and opinion.

When beginning your next assignment that requires sources, consider the credibility of those sources before including them in your final project.

Here are some common sources to avoid; each of these may include opinions and works of fiction disguised as facts.

Blogs

As you know, anyone can publish a blog on the Internet. The problem with using a blog as a research source is there no way to know the credentials of many bloggers or to get an understanding of the writer’s level of expertise.

People often create blogs to give themselves a forum to express their views and opinions. And many of these people consult less than reliable sources to form their beliefs. You could use a blog for a quote, but never use a blog as a serious source of facts for a research paper.

Wikipedia is not a reliable source. Wikipedia can be edited by anyone at any time. This means that any information it contains at any particular time could be vandalism, a work in progress, or just plain wrong. ... Wikipedia generally uses reliable secondary sources, which vet data from primary sources.

Same also goes with online forum

sound is invisible, but sometimes we can feel it. when a kettle-drum is thumped with a stick that time the tight drum skin moving up and down very quickly for some time and then it pumped sound waves into the air. loudspeakers also work in a similar manner.

components of a speaker:

electromagnet

in order to translate an electrical signal into an audible sound, an electromagnet is used in looudspeakers

  suspension

suspension is used to   center the voice coil in the gap of the magnet and it exerts a restoring force to keep it there. suspension is used to limits the maximum mechanical excursion of the diaphragm and voice coil.

voice coil

voice coil is a coil of wire which is attached to the apex of a loudspeaker cone. it provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.

cone

in a   loudspeaker, a   thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap due to which it vibrates   and produced sound. it is known as diaphragm and it can also be called a cone, though not all speaker diaphragms are cone-shaped.

surround

surround is also known as front suspension. surround is used to join the cone to the chassis. together with the suspension it controls the cone excursion, and it is also used to   determine how energy which is   travelling through the cone is absorbed, and how the speaker limits when it reaches the ends of its travel.

dustcap

dustcap is used to protect the voice coil from dust and dirt. it is a part of the cone.

how speaker work

the outer part of the cone is fastened to the outer part of the loudspeaker's circular metal rim. the inner part is fixed to   voice coil that sits just in front of a permanent magnet . when loudspeaker is hooked up to a stereo, electrical signals feed through the speaker cables into the coil. it will convert the coil into an electromagnet magnet . when electricity flows back and forth in the cables, the electromagnet either repels or attract the permanent magnet. this moves the coil back and forth, and it pull and push the loudspeaker cone. like a drum skin vibrating back and forth, the moving cone pumps sounds out into the air.in this way loudspeakers works.