Music – what is it? Where did it come from, and in general, why does it exist? It would seem that the questions are worthy of a child, and the answers to which are rather banal and known to everyone, but, nevertheless, who can give an exact answer? Let’s try to figure it out together, so …
20-30 thousand years ago, the first more or less intelligent people arose who had already begun to think about what else they would do on this planet, to do, except go hunting and war, thoughts than to fill their stomach, and playing the game »With females of the tribe. Probably many people are familiar with the “Pyramid of Needs” (from lectures on Economics, for example), judging by this pyramid, a person, after Continue reading
In music, an ensemble consisting of four musicians or singers is called a quartet. The most widespread among them was the string quartet, consisting of two violins, viola and cello.
It appeared back in the 18th century, when amateur musicians, gathering in the evenings, spent their leisure time playing the stringed instruments. Over time, prominent musicians began to unite in quartets. Such ensembles performed at the courts of princes, in the noble rooms, and since the 19th century. – in concert philharmonic halls. Now the string quartet is one of the most common types of chamber ensemble.
However, there are still a number of varieties of quartets. By the composition of the instruments, quartets Continue reading
To describe sound fields in acoustics, the sound pressure p, measured in Pascals (Pa), is widely used. As with electrical quantities in sound engineering, it is usually more convenient to use a logarithmic scale here. At the same time, the concept of sound pressure level (SPL) is introduced L = 20 log (p / p0), where p0 = 2 x 10-5 Pa is the sound pressure at the threshold of audibility. Very often, ultrasound is measured (or calculated) in separate frequency bands. The most widespread are octave or 1/3 octave bands with a relatively constant bandwidth. Geometrical average (below in the text for brevity, average) frequencies of these bands are regulated by international and domestic standards. A preferred range of mid frequencies for octave bands: … 125, 250, 500, … Hz; for 1/3 octave bands: … 125, 160,200, 250, … Hz. In addition to these narrow frequency bands, broadband correction is also applied, the form of which is Continue reading