What does one learn in basic audio knowledge?
Time:March 24, 2025
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An audio system primarily consists of a sound source device, an amplification device, and a speaker. Sound source devices such as mobile phones, computers, and CD players are responsible for providing audio signals. The amplification device, including a power amplifier, amplifies weak signals. The speaker converts electrical signals into sound. For example, when listening to music through an audio system connected to a mobile phone, the phone serves as the sound source, the power amplifier enhances the signal output from the phone, and finally, the speaker plays the music. They work together, and without any of these components, sound cannot be played normally. Moreover, the performance of different devices greatly affects the final sound quality.
The speaker unit is the core of a loudspeaker, commonly including bass, midrange, and tweeter units. The bass unit is large in size and responsible for producing deep and rich low frequencies, such as drum sounds and thunder; the midrange unit reproduces human voices and most instrument sounds, making human voices clear and natural; the tweeter unit is small in size and capable of emitting crisp and bright high frequencies, such as triangle sounds and bird chirps. Many loudspeakers combine different units to leverage their respective advantages. However, if the speaker unit is of poor quality, issues such as sound distortion and noise may occur.
Frequency response refers to the range of sound frequencies that an audio system can reproduce, measured in Hertz (Hz). The human ear can perceive sounds ranging from 20Hz to 20kHz. The closer an audio system's frequency response is to this range, the more complete the sound it can reproduce. For instance, if an audio system's low-frequency range only extends to 50Hz, it will lack the deep and powerful sensation when playing bass-heavy music. If its high-frequency range only goes up to 15kHz, some subtle treble details will be lost. A high-quality audio system produces stable sound output across the entire frequency spectrum, without any volume fluctuations in specific frequency ranges.
The speaker unit is the core of a loudspeaker, commonly including bass, midrange, and tweeter units. The bass unit is large in size and responsible for producing deep and rich low frequencies, such as drum sounds and thunder; the midrange unit reproduces human voices and most instrument sounds, making human voices clear and natural; the tweeter unit is small in size and capable of emitting crisp and bright high frequencies, such as triangle sounds and bird chirps. Many loudspeakers combine different units to leverage their respective advantages. However, if the speaker unit is of poor quality, issues such as sound distortion and noise may occur.
Frequency response refers to the range of sound frequencies that an audio system can reproduce, measured in Hertz (Hz). The human ear can perceive sounds ranging from 20Hz to 20kHz. The closer an audio system's frequency response is to this range, the more complete the sound it can reproduce. For instance, if an audio system's low-frequency range only extends to 50Hz, it will lack the deep and powerful sensation when playing bass-heavy music. If its high-frequency range only goes up to 15kHz, some subtle treble details will be lost. A high-quality audio system produces stable sound output across the entire frequency spectrum, without any volume fluctuations in specific frequency ranges.
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