Parameters about headphones
1. Impedance: Keep in mind that in the realm of direct current (DC), the role of objects on the current obstruction is referred to as resistance. However, in the field of alternating current (AC), in addition to resistance, capacitance and inductance will also obstruct the passage of current; this effect is known as reactance. The vectorial sum of resistance and reactance is what we term impedance. In general, low-impedance headphones are preferable. However, to prevent the headphones from overheating or voice coil deformation misalignment caused by broken sound, the volume must first be set down and then inserted into the headphones, and then a little bit of volume up. As a result, Walkman and other portable, power-saving machines should select low-impedance headphones, but also pay attention to the sensitivity of the Walkman indication, which is more significant.
2. Sensitivity: 1 milliwatt of power when the headset can be issued by the sound pressure level (the unit of sound pressure is decibels, the greater the sound pressure, the greater the volume), so generally the higher the sensitivity, the smaller the impedance, the easier the headset sound, the easier to drive.
3. Frequency Response: The frequency corresponding to the sensitivity value is the frequency response; the frequency response curve is drawn as a graph; human hearing can achieve a range of roughly 20Hz-20000Hz; the current mature headphone process has met this need.
Terms for evaluating sound quality
1. Tone range: the range of tones that a musical instrument or human voice may produce between the highest and lowest notes.
2. Tone: also known as tone product, the tone is one of the fundamental characteristics of sound. Erhu and pipa are two different tones.
3. Tone staining: The antithesis of music's natural neutrality, in which the sound is tinted with features that the program does not have, such as the type of sound created by speaking into a jar. Tone staining indicates that the played-back signal has an additional (or reduced) component, which is a distortion.
4. Distortion occurs when a device's output does not fully reproduce its input, resulting in waveform distortions or an increase or decrease in signal components.
5. Dynamic: The ratio of the maximum amount of information that can be recorded to the smallest amount of information.
6. Transient response: the equipment's capacity to track a sudden signal in music. The transient response of good equipment should be a signal that responds instantly to the signal, with the signal stopping on the rattle and never dragging. (For example, a piano)
7.Signal-to-noise ratio: also known as signal-to-noise ratio, the usable components of the signal as well as the strength of the noise contrast is frequently stated in decibels. The higher a device's signal-to-noise ratio, the less noise it creates.
8. Airy: An acoustic term that refers to the openness of the treble or the spatial separation of instruments in a sound field. The high-frequency response can now be extended to 15kHz-20kHz. "gray (dull)" and "thick (thick)" are antonyms.
9. The lowest frequency of audio equipment that may be replayed is referred to as the low-frequency extension. Is utilized to decide how far the audio system or speaker can dive when repeating bass. A tiny subwoofer's low-frequency extension, for example, can reach 40Hz, but a huge subwoofer dives to 16Hz.
10. The term "bright" refers to emphasizing the high-frequency band of 4kHz-8kHz when the harmonics are considerably stronger than the fundamental wave. Brightness is not a problem in and of itself; the live performance of the concert is a bright sound; the issue is being bright enough to master a good measure; being too bright (even whistling) will be bothersome.
About the headphone wire
Most of the headphone wires are copper as raw material, and the general purity (generally expressed in a few N, such as 4N, 6N ......) the higher the conductivity is better, the smaller the signal distortion and the more common are.
1. TPC (electrolytic copper): 99.5% purity
2. OFC (oxygen-free copper): 99.995% purity
3. LC-OFC (linear crystalline oxygen-free copper or crystalline oxygen-free copper): purity of 99.995% or more
4. OCC (single crystal oxygen-free copper): the highest purity, at 99.996% or more, and is divided into PC-OCC and UP-OCC
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