BT2621 handbag wireless bluetooth speaker outdoor multimedia subwoofer stereo stereo

BT2621 手提包无线蓝牙音箱户外多媒体低音炮音响立体声产品型号:BT2621产品颜色:可定制型号:BT2621蓝牙版本:蓝牙V4.1输出功率:4 w频率:100 hz ~ 20 khz阻抗:4欧姆 喇叭单元:40毫米 锂电池:800 mah案例材料:ABS +金属 尺寸:130 * 90 * 41毫米 重量:≥160 g无线范围:10 mJudging the sound quality fr

  • Model: BT2621 handbag wireless bluetooth speaker outdoor multimedia subwoofer stereo stereo

BT2621 手提包无线蓝牙音箱户外多媒体低音炮音响立体声


产品型号:BT2621


产品颜色:可定制



型号:BT2621

蓝牙版本:蓝牙V4.1

输出功率:4 w

频率:100 hz ~ 20 khz

阻抗:4欧姆

 喇叭单元:40毫米

 锂电池:800 mah

案例材料:ABS +金属

 尺寸:130 * 90 * 41毫米

 重量:≥160 g

无线范围:10 m

Development of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip Microcomputer

Development of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip MicrocomputerDevelopment of Single Chip Microcomputer


Judging the sound quality from the perspective of sound


How to evaluate the good and bad of a voice? I think this issue is worthy of discussion. That is to say, it mainly depends on two aspects to evaluate. One is subjective evaluation, which is to rely on the auditory organs of the human ear to feel the sound of people; the other is objective evaluation, which is the actual quality of the sound. Subjective evaluation is based on listening, and objective evaluation is based on measurement, or measured by measurement standards. If you use these two methods to evaluate the sound quality at the same time, it will be more comprehensive.


If the subjective evaluation is used to evaluate the sound quality, there are some imperfections. There are many factors that affect subjective evaluation.


1. Human ear sensitivity speaker manufacturers


Due to the differences in the physiological structure, health and development of each individual, the auditory sensitivity of each individual is different, and the auditory sensitivity of the left and right ears is also different. This causes the hearing sensitivity of each person to be different, just like the human vision. Some people have 1.5 left and 1.2 right, while others have 0.5 left and 1 right. So this has a great influence on the evaluation of timbre.


2. The effect of age on hearing


Due to physiological reasons, as the age increases, the auditory organs such as the eardrum and cochlea weaken the elasticity of the tissue at different frequency perception points, so the ability to distinguish high-frequency sounds will gradually decrease, which affects the accuracy of the sound quality evaluation Sex.


3. Affected by education level Shenzhen Bluetooth speaker manufacturer


The level of a person's educational level affects the subjective evaluation. Because the field of acoustics is a multidisciplinary and complex physical phenomenon, it has a very close relationship with physics, mathematics, architecture, music and other disciplines. To have a comprehensive and accurate understanding of timbre, it is necessary to have a considerable level and quality level in all aspects. Therefore, the comprehensiveness and depth of a person's education affect the evaluation of timbre.


4. Speaker manufacturers with artistic appreciation ability


Everyone has different artistic qualities and artistic concepts, resulting in different understanding of the artistic expressiveness of timbre. This aspect is also one of the factors that affect the evaluation of timbre.


5. People's psychological impact


Everyone has different feelings about tones in different periods, different moods, different living environments, and different mental states (mentality). This also affects the subjective evaluation of timbre.


6. Everyone's preference


Each may belong to this or that art genre in a different field of art, so everyone has a certain psychological preference, which is allowed. Therefore, this factor also affects the evaluation of sound quality.


7. Different countries and nations


Different countries, different ethnic groups, different regions and different times have different standards and listening habits for the understanding of timbre. So the evaluation of timbre is very different.


Therefore, subjective evaluation is a comprehensive artistic evaluation of feeling, which is affected by many factors.


The accuracy of subjective evaluation of timbre depends on the hearing sensitivity of the human ear and the ability to distinguish and analyze the structure of timbre, so as to distinguish the pros and cons of timbre. Moreover, there is often a big difference between subjective evaluation and objective evaluation. This is because subjective evaluation is the direct perception of sound by the human ear, while objective evaluation is the accurate sound received by the instrument or equivalent to the sound felt by the instrument . Since there are many acoustic effects on the auditory sense and acoustic effects on the sound field when the sound is transmitted to the human ear, the two are different. Only when the various acoustic effects are taken into account, the two will be unified and coordinated. That is:


Subjective evaluation = objective evaluation + human ear effect


To make a comprehensive subjective and objective evaluation of sound quality, we must first have a comprehensive understanding and understanding of the structure of the tone, especially the overtone structure, and have the ability to analyze. Only in this way can we accurately judge the quality of a tone.


BT2621 手提包无线蓝牙音箱户外多媒体低音炮音响立体声


产品型号:BT2621


产品颜色:可定制



型号:BT2621

蓝牙版本:蓝牙V4.1

输出功率:4 w

频率:100 hz ~ 20 khz

阻抗:4欧姆

 喇叭单元:40毫米

 锂电池:800 mah

案例材料:ABS +金属

 尺寸:130 * 90 * 41毫米

 重量:≥160 g

无线范围:10 m


BT2621 手提包无线蓝牙音箱户外多媒体低音炮音响立体声


产品型号:BT2621


产品颜色:可定制



型号:BT2621

蓝牙版本:蓝牙V4.1

输出功率:4 w

频率:100 hz ~ 20 khz

阻抗:4欧姆

 喇叭单元:40毫米

 锂电池:800 mah

案例材料:ABS +金属

 尺寸:130 * 90 * 41毫米

 重量:≥160 g

无线范围:10 m