Psychological Characteristics of Sound: (6) Subjective Hearing

The Music Telegraph | Text 2020/06/25 [15:21]

Psychological Characteristics of Sound: (6) Subjective Hearing

The Music Telegraph| 입력 : 2020/06/25 [15:21]

 

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Psychological Characteristics of Sound: (6) Subjective Hearing

 

In addition to the objective contents of sound perceived by listeners, there are also the subjective contents of sound generated by non-linear sound transmission through the Middle Ear. The reason this is called subjective is that it is not actually present in the stimulus, but only in the way the ear responds to the stimulus. Since physiological discussion of the human ear was covered in the past article, we are now more interested in the effects of music and to explore human ear nonlinearity.

 

Aural Harmonics means that human ear perceives complex sounds by adding a subjective tone when the stimulus is applied to the ear as a pure sine wave. When the stimulus is combined at two or more frequencies, the tone creates a combination tone, which causes beat to each other. Subjective tones may not be perceived if the stimulus is at a very low level of amplitude. However, as the amplitude increases, the Aural Harmonics increases. As the intensity of a single tone increases, the quality change of the audible tone is due to the increase in the amplitude of the subjective tone.

 

Let's take an example of a human subjective hearing. Masking is a phenomenon in which one tone hides the other, so that the hidden sound cannot be easily heard. In general, high frequency sounds are masked by low frequency sounds easily. Because high frequencies are usually low-frequency harmonics, the masking effect determines the tone color of a sound. When the frequencies of a sound are separated, the masking effect is reduced, but not completely eliminated.

 

The masking effect is well known mainly to orchestral players of classical music. When you play with multiple players, you may not even hear the sounds of the instrument you play. The sensible nuance of masking increases when instruments try to balance the volume of each other. Even in electronic music, this masking phenomenon is likely to occur, and the solution to this requires constant trial and error. 

 

 

 

 

 

 

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