Its resulting

In Music, one understands by his resulting , the result of a Interférence between two sounds, two notes of music.

It is about a third sound, perfectly audible, although notably weaker, produced by the Interférence of the two first, and correspondent with their difference Acoustique:

For example, an interval of pure third, report/ratio 5/4, will emit a sound resulting from 5/4-1=1/4, that is to say the note of bottom, but two octaves in lower part. For example do4-mi4 makes it possible to hear a do2 , very thin. To make make this experiment, it is to better use stamped and acute instruments: the Recorder is a perfect means of highlighting this phenomenon. However, is needed that the breath of the players is perfectly stable and the precision of large accuracy, the sound resulting evolving/moving very quickly according to the relative accuracy from the two notes.

This phenomenon was used in particular in the mechanical organ (Limonaire S), in order to mitigate the absence, by concern for economy, certain basic pipes. One hears really a pipe which does not exist, a virtual pipe, to some extent. It is also used in certain registers of large organ.

It is about the same phenomenon of interference as the Battement, but of a higher, audible frequency then as a Its musical, and either as a periodic phenomenon.

It is important to know that the resulting sound produced by an interval right is not right compared to this interval. For example the octave produced by a perfect fifth is just also, but cannot be obtained by using the semitones of this perfect fifth. If one tests nevertheless, our octave will be broader than the resulting octave. The difference is obvious - the 12th root of 2 is < 7th of 1.5 gold the semitones of the perfect fifth are broader than those of the octave right!

Random links: