Group items tagged

The first method involves removing or lowering the actual frequency of the instrument using everything from your TV's built-in equalizer to running your sound through an audio filter. The audio filter technique is used by audio and video editors to remove hums and buzzes from soundtracks. It works by identifying an exact frequency and removing it. Most vuvuzelas apparently buzz away in the key of B Flat. Bach composed his Brandenburg Concerto No. 6. in the key of B flat and it sounded nice. When soccer fans make B flats it sounds like angry bees.

The second method *apparently* involves noise cancellation. Found at antivuvuzelafilter.com, the idea is that you download an mp3 that directly counters the frequencies produced by the sound of the vuvuzela. You play it alongside the TV and the vuvuzela sound disappears. The makers explain it this way: Our specially designed Vuvuzela noise-cancellation sound is a wave with the same amplitude but with an inverted phase to the original sound.The waves combines to form a new wave, in a process called interference, which effectively cancel each other out - an effect which is called phase cancellation.Depending on the circumstances the resulting soundwave may be so faint as to be inaudible to human ears.

By David Harley, Pierre-Marc Bureau and Andrew Lee Apple's customer-base has rejoined the rest of the user community on the firing line. This paper will compare the view from Apple and the community as a whole with the view from the anti-virus labs of the actual threat landscape.

By David Harley This 1997 paper reviews the shared history of viruses and the Mac, summarizes the 1997 threatscape, and considers possibilities and strategies for the future. It's been made available for historical interest because so many people asked about it at EICAR 2010. First published in Virus Bulletin 1997 Conference Proceedings.*

By Craig Johnston and David Harley This paper looks at the ethical, political and practical issues around the use of "policeware", when law enforcement and other legitimate agencies use "cybersurveillance" techniques based on software that resembles some forms of malware in its modus operandi.