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What are the meanings of some of the related parameters and sound quality of headphones?

- Jul 04, 2017 -

1. Headset related parameters

Impedance: Note that in the world of direct current (DC), the effect of the object on the current obstruction is called resistance, but in the field of alternating current (AC), in addition to resistance will impede the current, the capacitance and inductance will hinder The flow of current, this effect is called the reactance, and we are talking about the resistance of the resistance and reactance in the vector and.

Sensitivity: point to the headset input 1 mW power headphones can be issued by the sound pressure level (sound pressure unit is decibel, the greater the sound pressure the greater the volume), so the higher the general sensitivity, the smaller the impedance, headphones easier Sound, the easier it is to drive.

Frequency response (Frequency Response): frequency corresponding to the sensitivity value is the frequency response, drawn into the image is the frequency response curve, human hearing can reach the range of about 20Hz-20000Hz, the current mature headset technology has reached this Claim.

2. Terminology of sound quality evaluation

Range: The instrument or vocals can reach the range between the highest and the lowest

Voice: also known as sound goods, one of the basic attributes of sound, such as erhu, pipa is a different tone

The opposite of the natural nature of the music, that is, the sound of the program itself does not have some of the characteristics, such as facing a jar speech to get the kind of voice is a typical sound dye. The dyed indicates that the reproduced signal is out of (or reduced) some of the components, which is obviously a distortion.

Distortion: the output of the device can not completely reproduce its input, resulting in distortion of the waveform or signal components increase or decrease.

Dynamic: Allows you to record the ratio of the maximum and minimum information

Transient response: the ability of the device to follow the sudden signal in the music. Transient response to a good device should be a signal to immediately respond, the signal stopped at a sudden stop, never dragging its feet. (Typical instrument: piano)

Signal to noise ratio: also known as the signal to noise ratio, the useful components of the signal and the strength of the noise contrast, often expressed in decibels. The higher the signal-to-noise ratio of the device, the less noise it produces.

An acoustic term used to indicate the openness of a treble, or a space between the instruments in space between instruments. At this point, the high frequency response can be extended to 15kHz-20kHz. There are "dull" and "thick". Very abstract words, not a sense of space. It is more suitable for listening to large works or in large venues to play the program. It is a higher frequency, more casual sound.

Low frequency extension: refers to the audio equipment can reproduce the lowest frequency. Is used to determine the extent to which the sound system or speaker can be dive to the extent that the bass is reproduced. For example, the low-frequency subwoofer low-frequency extension can go to 40Hz, while the large subwoofer is dive to 16Hz.

Bright: refers to the 4kHz-8kHz high-frequency band, when the harmonic is relatively stronger than the fundamental. Bright and there is no problem, the live concert are bright voice, the problem is bright to grasp the sense of proportion, too bright (even whistle) will be annoying.

Sound quality: sound quality of the term is not abstract. When you turn on a radio while listening to music or news, when you feel it sounds, the radio broadcasts the announcer's voice sweet and has a level of garden run. Distortion is small, music when the treble is bright, bass rich, reverberation is good. You naturally can not help but exclaimed: "This radio sound good"! Sound quality is the most basic and most extensive evaluation term for evaluating audio equipment.

Sound: the sound will be the same as the light will be color, but it is not seen with the eyes, but with the ears to hear. The sound the more the sound the more soft, the more cool the sound sound harder. Sound can be used "beauty" and "noble" and so on to describe. When you play the violin, you can say that the sound of the violin is so cold or so warm.

Sound field sense: This includes the shape of the sound field, before and after the location, height, width, depth and other items, these items can be very specific that is the sound field of the presence of the scene. This is the listener and speaker position, the space between the three to achieve a more subtle, appropriate integration point to show the feelings.

Hierarchical sense: This is the sound field from the front row of rows of instruments to clear the degree of sound, as well as the instrument and the interval between the instrument clear. This is a sense of feeling like a section of wood cross-section of the wooden ring lap circle of a sense of arrangement.

Positioning: simply say that the sound of human voice or instrument sound is clear, the exact location. Generally speaking, the sound is that the sound is not good. In the sound field, relying on both sides of the instrument positioning sense is usually better, and the sound field center of the instrument positioning will be relatively poor. This is also one of the reasons why the surround sound is added to the middle channel. Plus the middle channel to help the positioning.

Transparency: the best sense of transparency, the sound is not harsh is the most intuitive, each pair of ears for the sense of tolerance and intolerance are not the same degree of feeling. So there is a different standard for the quality of transparency.

Knot force and body feeling: As the name suggests, strong image force is the vaguely voiceless voice condensed into the entity's ability. In other words, the ability to show the sound of a human voice or musical instrument. Good knot sound equipment will make audio and video more floating, more three-dimensional.

Resolution: music subtle changes can be clearly expressed, both low-level resolution, there are high-level resolution, integrated low and high level of resolution, is our so-called resolution.

The overall balance: mainly to speak high, medium and low frequency of the appropriate sense of distribution. Reasonable high, low in the amount of sense is the overall balance, listening to music feel soft but flexible, bright, cheerful and there are levels, clear, fusion and three-dimensional. Spot strong, so good sound equipment as a whole will be reflected.

Rosin: generally used for the evaluation of the string, the common saying that "full of rosin", "rosin flavor" and so on. In fact, this is a high pitch (higher frequency), low loudness, burr, but sounds pleasant.

Elasticity: commonly used in the evaluation of low frequency, more abstract, with strength, full and happy.

Cold, warm: both are happy, cold sound quality is clear, there is strength, and even slightly burr, warm sound quality bright, rounded, the intensity is not so abundant.

Full, shriveled, full of sound full, broad, harmonious, pleasant and has a certain degree of loudness, and dry voice thin, split, dry, uncomfortable and loudness is generally smaller.

Wide and narrow: both directly related to the frequency range of the replay program. If the playback of high-musical instruments and bass instruments can be a good show, giving a broad feeling, called wide. On the contrary, the playback program can not hear the basic sound of high musical instruments and bass instruments, only the frequency, as in the phone to hear the sound, it is uncomfortable, this is narrow.

Loose, tight: a voice if more casual, more rounded, there is a certain amount of water and not uncomfortable called loose, and the sound intensity, but more dry gray is tight, people are not happy.

Fat, thin: fat is too full, that is too much low frequency and a lot of water, that is, a certain frequency distortion (low frequency component too much) and reverberation emphasis. The concept of thin and wit quite.

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