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Each instrument has its own unique spectrum and timbre. If you want to improve your music appreciation ability, you must do more listening comparison. That is, when playing the same song, what are the differences between the timbre released by the sound box system and that of the actual instrument? Before doing so, you should first understand some electroacoustic terms, the auditory characteristics of the human ear and the main technical parameters of sound equipment. Let me introduce some of them to you.

Part of the electroacoustic terms

1, pure tone: it has two meanings: (1) refers to the instantaneous sound pressure sinusoidal change at any time between sound waves; (2) A sound with a definite single tone.

2. Pitch: refers to the lowest frequency component of the compound sound.

3. Overtone: a compound tone whose frequency is higher than that of the pitch. Its frequency may be an integral multiple of the pitch frequency or not. Various instruments with different playing methods can produce different amount and strength of overtone components, even if the pitch is the same, they can have different timbre.

4. Acoustic wave: A mechanical wave propagating in an elastic medium, originating from the vibration of a sounding body. The range of sound wave is 20Hz-20khz, the sound wave with a frequency higher than 20KHz is ultrasonic wave, and the sound wave with a frequency lower than 20Hz is infrasonic wave. Ultrasonic wave and infrasonic wave generally cannot cause hearing, and only the sound wave with a frequency between them can be heard. We call the audible sound wave or audible sound.

5. Sound field: refers to the area in the medium where sound waves exist. Different sound sources and environments can form different sound fields.

6, loudness: also known as "volume", the human ear to the volume of a feeling. Depends on sound intensity, frequency and waveform.

7, timbre: also called "sound", mainly by its harmonic and the relative amplitude of each harmonic determined.

2. Auditory Characteristics of the human Ear

The sensitivity of human ear to the direction, loudness, tone and timbre of sound is different, and there are great differences.

1. Sense of orientation: human ear has a very strong ability to distinguish the direction, distance and location of sound propagation. This auditory property of the human ear is called "sense of position".

2. Loudness perception: for small sounds, human ears can sense them as long as the loudness increases slightly. However, when the loudness of the sound increases to a certain value, there is no obvious change in the perception of human ears even if there is a larger increase. Usually audible sound is divided into three parts according to the frequency doubling relation to determine the low, medium and high frequency band. Namely: bass band 20Hz-160Hz, alto band 160Hz-2500Hz, treble band 2500Hz-20KHz.

3, timbre sense: refers to the human ear has a special auditory comprehensive feeling of timbre.

4. Focusing effect: The auditory property of the human ear can focus from many sounds to a certain point. For example, when we listen to a symphony, we focus our energy and hearing on the sound played by the violin, and the music played by other instruments will be suppressed by the cerebral cortex, making you feel the pure sound of the violin. This inhibition ability varies from person to person. People who often do listening exercises have strong inhibition ability. We call this auditory characteristic of the human ear "focusing effect". Doing more exercises in this respect can improve the human ear's ability to discriminate the timbre, quality, analytic power and level of a certain spectrum.

3. Main technical indexes affecting sound quality and timbre

1. Frequency range: the working frequency band width of the power amplifier under the specified distortion degree and rated output power condition, that is, the range between the lowest working frequency and the highest working frequency of the power amplifier.

2. Frequency response: The phenomenon that the output gain of the power amplifier increases or decreases with the frequency of the input signal and the phase lag changes with the frequency of the input signal. This index is the most important basis for evaluating the quality of power amplifier. The smaller the decibel value is, the flatter the frequency response curve of power amplifier is, the smaller the distortion is, and the stronger the recovery degree and reproduction ability of signal is.

A good set of audio equipment, not only to put all kinds of Musical Instruments out of line again, but also to put all kinds of Musical Instruments playing location, distance, scene. No matter what color or model one prefers. If matched into a system, and then play out the timbre of the auditory difference, then it can not be a good equipment, or can not be a perfect sound system, the true meaning of hi-fi is high reduction.

If your sound equipment does not reproduce the sound of the original instrument, then it is not hi-fi equipment. When we use subjective hearing to judge a sound equipment, we should pay full attention to this point, not because of personal preference and affect the correct judgment and identification ability to improve.