Longitudinal wave and seismic P-waves (created by earthquakes and explosions). In longitudinal waves, the displacement of the medium is parallel to the propagation of the wave, and waves can be either straight or round. A wave along the length of a stretched Slinky toy, where the distance between coils increases and decreases, is a good visualization. In the case of longitudinal harmonic sound waves, the frequency and wavelength can be described by the formula where: The quantity "x"/"c" is the time that the wave takes to travel the distance "x". The ordinary frequency ("f") of the wave is given by The wavelength
A Guy Called Gerald This way it makes it easy for me to create the atmosphere and the rhythm suitable for the individual dancefloor. Kind of like an open kitchen in a restaurant – it’s an open kitchen in a club bringing the food to the people instantly – as soon as it’s produced it’s already on the dancefloor. What I’m looking for in 2015 is sound reproduction in the clubs being taken a lot more seriously than in the past."" A Guy Called Gerald Gerald Simpson (born 16 February 1967), better known as A Guy Called Gerald, is a British DJ, record producer