Double amplifier power does not double the volume

This article logically shows the relationship between amplifier power, SPL and loudness. It includes a level difference exercise and a gain calculator.

Reflections on the TV Remote Control

The recent passing of Eugene Polley, the man known for inventing the remote control, has given me cause to reflect on the development of...
Analogue TV acronyms

Analogue TV Acronyms

What does NTSC, SECAM and PAL mean? These acronyms often pop up when setting up an analogue TV or burning a DVD video.Basically, they...

A Day in the Life of the Internet

According to PC & Tech Authority (May 2012), the following is a typical day in the internet: 294 billion emails are sent 172 million people visit...

Phone & Ipod Chargers

 Do phone chargers and Ipod chargers draw power when not connected to their device? The answer is: it depends on the type of charger.There...

The Cost of Standby Power

In the popular press there have been a number of reports along the lines of "households wasting hundred of dollars on standby power". Being...