Search results
Results from the WOW.Com Content Network
On Dec. 5, Saoud Khalifah, the founder and CEO of FakeSpot, posted a tweet targeting the five most fake reviewed categories on Amazon. The tweet comes "after the record breaking Black Friday/Cyber...
Dome tweeter with a membrane with 25 mm diameter made from titanium; from a JBL TI 5000 loudspeaker box, c. 1997. A dome tweeter is constructed by attaching a voice coil to a dome (made of woven fabric, thin metal or other suitable material), which is attached to the magnet or the top plate via a low compliance suspension.
The white van speaker scam is a scam sales technique in which a con artist makes a buyer believe they are getting a good price on home entertainment products. Often a con artist will buy inexpensive, generic speakers [1] and convince potential buyers that they are premium products worth hundreds or thousands of dollars, offering them for sale at a price that the buyer thinks is heavily ...
Amazon changed its policy of allowing anonymous reviews to one which gave an online credential to reviewers registered with Amazon, although it still allowed them to remain anonymous with pen names. In April 2010, British historian Orlando Figes was found to have posted negative reviews of other authors' books. [ 360 ]
“An Amazon email scam can look exactly like a real Amazon email, or can be poorly crafted, and everything in between,” according to Alex Hamerstone, a director with the security-consulting ...
A piezoelectric speaker (also known as a piezo bender due to its mode of operation, and sometimes colloquially called a "piezo", buzzer, crystal loudspeaker or beep speaker) is a loudspeaker that uses the piezoelectric effect for generating sound. The initial mechanical motion is created by applying a voltage to a piezoelectric material, and ...
Metal disks with piezo material, used in buzzers or as contact microphones. Piezoelectric technology can measure various physical quantities, most commonly pressure and acceleration. For pressure sensors, a thin membrane and a massive base is used, ensuring that an applied pressure specifically loads the elements in one direction.
The following table lists the following properties for piezoelectric materials The piezoelectric coefficients (d 33, d 31, d 15 etc.) measure the strain induced by an applied voltage (expressed as meters per volt).