What Are Subwoofer Headphones?

Hi-Fi is the abbreviation of English High-Fidelity, which is literally translated as "high fidelity", and its definition is: replay sound that is highly similar to the original sound. So what kind of audio equipment is the playback sound Hi-Fi? It is difficult to draw firm conclusions so far. Professionals in the audio industry rely on various instruments and various methods to detect various indicators to determine the degree of equipment Hi-Fi, and audiophiles often judge by their ears whether the equipment reaches the Hi-Fi in their minds. . Judging the level of high-fidelity of the playback sound requires not only excellent equipment and software, but also a good listening environment. Therefore, how to correctly measure the Hi-Fi level of audio equipment, there are still differences between objective testing and subjective evaluation.

HiFi headphones

Hi-Fi is the abbreviation of English High-Fidelity, which is literally translated as "high fidelity", and its definition is: replay sound that is highly similar to the original sound. So what kind of audio equipment is the playback sound Hi-Fi? It is difficult to draw firm conclusions so far. Professionals in the audio industry rely on various instruments and various methods to detect various indicators to determine the degree of equipment Hi-Fi, and audiophiles often judge by their ears whether the equipment reaches the Hi-Fi in their minds. . Judging the level of high-fidelity of the playback sound requires not only excellent equipment and software, but also a good listening environment. Therefore, how to correctly measure the Hi-Fi level of audio equipment, there are still differences between objective testing and subjective evaluation.

Hi-Fi = high-fidelity. Hi-Fi systems in the mouth of audiophiles generally refer to audio equipment with high technical indicators. Endless on Hi-Fi.

Chinese name

HiFi headphones

Foreign name

HIFI headphones

Alias

Hi-fi headphones

Brief introduction

Headphones very close to real sound

Types of

headset

Impedance

Note the difference between resistance and resistance. In the world of direct current (DC), the role of objects in blocking current is called resistance, but in the field of alternating current (AC), in addition to resistance, it can block current, and capacitance and inductance can block current Flow, this effect is called reactance, and what we usually call impedance is the sum of resistance and reactance on a vector.

Sensitivity

The sound pressure level that the earphone can emit when the power of 1 milliwatt is pointed to the earphone. The easier it is to drive.

Frequency response

The sensitivity value corresponding to the frequency is the frequency response, and the image is the frequency response curve. The range that human hearing can reach is about 20Hz-20000Hz. Today, mature earphone technology has reached this requirement.

Headphone wire

Most earphone cables use copper as the raw material. Generally, the higher the purity (usually expressed as a few N, such as 4N, 6N, ...), the better the conductivity and the smaller the signal distortion. The common ones are:

TPC (electrolytic copper): 99.5% purity

OFC (oxygen-free copper): 99.995% purity

LC-OFC (linear crystalline oxygen-free copper or crystalline oxygen-free copper): purity above 99.995%

OCC (single crystal oxygen-free copper): the highest purity, above 99.996%, is divided into PC-OCC and UP-OCC

1. The sound is pure, without any unpleasant "hiss", "weng", "coax".
2. The balance is good, the sound is never too bright or too dark, the high and low frequency energy is evenly distributed, the fusion between the frequency bands is natural and smooth, there is no suddenness and glitches 3. The high frequency extension is good, delicate and soft.
4. Deep dive at low frequency, clean and full, full of flexibility and strength, without any fat and slow feeling.
5. The intermediate frequency distortion is extremely small, transparent and warm, the human voice is friendly and natural, has thickness, is magnetic, does not exaggerate and nasal.
6, good resolution, rich in details, even small signals can be clearly reproduced.
7, has a good sound field characterization ability, the sound field is wide, the instrument positioning is accurate and stable, there is enough information in the sound field, there is no hollow feeling.
8. There is no obvious compression in dynamics, and it has a good sense of speed. It does not distort or distort at high volume.

Sound range: the range between the highest and lowest sounds of an instrument or human voice

Voice: Also known as the fret, one of the basic attributes of the sound, such as erhu and lute are different tones

Sound Dye: The natural opposite of music, that is, the sound is stained with some characteristics that the program itself does not have. For example, the sound obtained by speaking into a jar is a typical sound dye. The coloration indicates that some components are added (or reduced) in the reproduced signal, which is obviously a kind of distortion.

Distortion: The output of the device cannot completely reproduce its input, which causes distortion of the waveform or increase or decrease of the signal component.

Dynamic: Allows recording the ratio of maximum information to minimum information.

Transient response: the ability of the equipment to follow burst signals in music. Equipment with good transient response should respond immediately when the signal comes, and stop when the signal stops. (Typical instrument: piano)

Signal-to-noise ratio: Also known as signal-to-noise ratio, the useful component of the signal is compared with the strength of the noise, often expressed in decibels. The higher the signal-to-noise ratio of a device, the less noise it produces.

Air sense: An acoustic term used to indicate the openness of treble, or the space between instruments in the sound field. At this time, the high-frequency response can be extended to 15kHz-20kHz. Antonyms are "dull" and "thick".

Low frequency extension: refers to the lowest frequency that can be reproduced by audio equipment. It is used to determine the

HiFi headset headset care

1. It is best not to wear earphones while sleeping, which will cause the earphone wires to wrap around the neck or twist the wires together, and even cause the casing to be crushed. If necessary, the best way is to hang the headset up and hang the headphone cord over the head with a rubber band. This will not press the headphones even if you turn over.
2. Wipe off sweat, etc. from the headset cable after using the headset. These human secretions are the invisible killer of wire. Over time, the wire will age and eventually lead to seams and breaks.
3. Be sure to turn off the volume of the small audio source device before using it. If the volume of the output device is too high, it will not only damage the ears, lightly break the membrane folds, and severely burn the voice coil of the headphones.
4. Keep the headset away from strong magnetism. Otherwise, the magnetism of the unit will decrease, and the sensitivity will decrease over time.
5. Keep the headphones away from humidity. The pads in the headphone unit will rust and increase the resistance, which will cause the headphones to be biased.
6. Plug part. If you put a Walkman player such as an mp3 in your pants pocket, the outlet part of the plug is easily broken, resulting in disconnection.
7. Don't disassemble the headphones at will. This will cause complete damage to the headset.
8. It is best not to use it outside in winter. The weather is cold in winter, the wire is relatively hard and brittle, and excessive bending can easily break the wire. At this time, the headphone wire cannot be heated, and the high temperature will accelerate the aging of the wire.
9. Keep away from chemicals. The paint on the headphone case is easily dissolved in organic chemicals.
10. Ensure that the earphone net cover is clean, and do not allow the unit part to be exposed to excessive dust.
11. During the use, the earphone cable should be avoided as much as possible from being damaged by pulling or heavy pressure.
12. Try not to play CS games immediately with newly purchased headphones. Because the various sound effects in CS are more exciting for new headphones with a tighter diaphragm. Therefore, you should use appropriate soothing music for proper "", and then use it normally after slowly entering the state.
13. The headset cannot withstand frequent drops and sudden high-altitude pulls, which will cause great damage to the overall headset, voice coil, diaphragm, and wires.
14. When pulling the plug of the earphone, you must hold the plug on the front end. Do not hold the cable directly to pull it. 15. The earphone is a personal item. It is better not to use it after communication. Be sure to clean it after use. Pay more attention to the earplugs.
16. Take care not to fold the line when closing it, but to close it with a certain degree of radian to avoid breaking the wire.
17. Most earplugs are designed with sound-proof cotton outside the ventilation holes at the back, which can prevent magnets and other particles from inhaling dust and accelerate aging. It is recommended not to remove the sound-proof cotton; most earplugs use a relatively fine mesh in front of them to prevent large dust from entering. It is recommended to add a sponge cover when the earplugs are not used for a long time.

Notes on HiFi headphones

Users should pay attention to the earphones suitable for the Walkman. Due to the limitation of the battery power of the Walkman, the output power of the Walkman is generally only a few milliwatts. Therefore, the sensitivity of the earphones suitable for the Walkman is very high and its power tolerance It is relatively low. If this type of headphones is used on a desktop CD player or on a computer, you must pay attention to it. Excessive volume can deform the coil and diaphragm of the headphones, causing ringing or burning.