There are various types of viruses and parasites, and viruses are themselves parasites. While biological viruses are infectious agents that self-replicate inside living cells, computer viruses are destructive pieces of code that insert themselves into existing programs and change the actions of those programs. One particularly nasty type of computer virus that relies on humans for replication, known as a “Trojan horse,” disguises itself as something useful or interesting in order to persuade individuals to download and spread it. Similarly, a harmful ideology disguises itself as something beneficial in order to insert itself into the brain of an individual, so that it can instruct them to behave in ways that transmit the mental virus to others. The ability for parasites to modify the behavior of hosts in ways that increase their own “fitness” (i.e., their ability to survive and reproduce) while hurting the fitness of the host, is known as “parasitic manipulation.”
Monaural beats have similarities to binaural beats, but the two separate frequencies are delivered through a pulse pattern and mixed before they reach the listeners ears, resulting in the advantage of being audible without stereo headphones. However, using stereo headphones intensifies the effectiveness of monaural beats and is recommended for the best effect.