psychoacoustic approach psychoacoustic approach is based on the principle that our brain reacts differently depending on the tone of the sound and depending on the speed ;. This approach is among the least known, but one of the most interesting.
To explain the best approach to analyze the first psychoacoustic Occor lacatteristiche sound.
The sound from the point of view is a physical wave: propagation of a disturbance in which there is a power transmission, but there is no transport of matter. The sound in particular is the longitudinal elastic wave propagation due to changes in air pressure (compression / refraction). The wave is characterized by a frequency that corresponds to the number of complete oscillations that a wave makes in one second. The unit of frequency is hertz (1 Hz = 1 seconds raised to the minus one). The human being is able to hear waves have a frequency range of 30 to 20 000 Hz, the waves with a frequency above 20,000 Hz are called ultrasound. The sounds are physical phenomena that can affect everything they come in contact. Sounds of particular frequencies can break a glass, giving orders to a dog and addiruttura affect plant growth. The sound is also able to influence a biological human being gives rise to feelings caused by the vibration of the membrane in the ear and the brain translates into a series of stimuli of chemical and power carried by the auditory nerve.
The first studies on emotional responses to music dates back to 1936, when the psychologist and musicologist Kate Heinef showed that there are two essential elements that our brain uses to process an emotional response to music: the way, that is tonality (major / minor) and the time that the execution speed (fast / slow). It is well noted that the combination of mode and time the man gets the emotion that can be universally defined.
The key to reading as follows:
major mode / time = slow serenity
major mode / fast time = happiness, euphoria, exaltation
Mode minor / slow time = sadness, melancholy
minor mode / fast tempo = fear, drama, angst
The fact that these emotional responses are common to all important is shown by another experiment performed in time More recently, in 1958, to 'University of Montreal by Isabella Peretz . qesto researcher recorded the changes induced by music on various physiological parameters like blood pressure, heart rate and skin electrical conduzine (electrodermal response). In this experiment a group of subjects was subjected to listening to different songs that were classified as happy, calm, fearful, sad. At the end of 'experiment proved that the music produced the same effect on all listeners, regardless of subjective judgments about the song heard. For example the songs classified as fearful were those that determined the greater skin reaction characterized by an increase rilavante sweating. The fact that these physiological responses are independent of subjective guidizi can show that the listener is not necessarily aware of the affection that the music had on him and this makes us will understand what power music has on our behavior.
's approach pesicoacustico phenomenon is explained by the physical activity and eletrica resonance of our brain. Qust'ultimo it emits waves have a frequency below 30 Hz called brain waves, which can be classified into 4 types.
Each type corresponds to 4 different physiological stages:
TO DELTA: 0.5 to 4 Hz>> sleep
Theta waves, 4 to 8 Hz>> first stage of sleep and sleepiness
ALPHA WAVES: 8 to 14 Hz>> relaxation vigilant
BETA WAVES: 14 to 30 Hz>> alertness and concentration
As for the Fison fanomeno of this can be more easily understood by means of experiments: in 1665 the physicist Huygens Christiian (among the first to postulate the wave theory of light) observed that, having two clocks on a wall, a place side by side, they tended to synchronize their oscillatory movement, assumese almost wanted "the same pace, more precisely echoes a the other to its frequency. Similarly, if hitting a tuning fork, which produces waves on a certain frequency and placed close to a second tuning fork "quiet" after a brief interval, it also begins to vibrate . Qesto phenomenon is now called "resonance".
resonance imaging can also be used in case of brain waves. Indeed, given that all the brain waves as the waves possess a measurable frequency in Hz, if the brain is subjected to pulses of different frequency, its tendency is naturel that of "sync." qindi, if an external stimulus is applied to the brain, it becomes possible to change the frequency of its waves. For example, if a person is in Beta stage (alarm) and its brain receives an external stimulus of 10 Hz, which as noted above corresponds to the alpha (relaxation), then it is likely that the its various frequency, synchronizing to that of the external stimulus. O vviamente if the state of the brain is already close to the frequency of the stimulus applied, the induction works more effectively.
if this does not show that music therapy is a science then I'm REALLY a squirrel è_é
Everything born from a discussion to 'blood on unlitmo' Never trust the practice .... entangled in similar talks with a "physical">. \u0026lt;
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