Vacuum or in-ear monitor - a more advanced modification of the inserts, they are gradually replacing the market. They are just as light and compact as precursors, but are deprived of their main drawbacks.
The speakers are inserted in the auditory canal, in close contact to its walls and does not drop when driving through elastic nozzles (embouchure). Therefore, they can be used on a morning jog in the gym, and other similar situations.
- Good noise reduction due to the structure;
- sound transmission quality, especially at low frequencies with deep bass.
Among the shortcomings commonly referred to:
- excessive load on the organs of hearing due to the fact that the sound source is too close to the membrane;
- unpleasant physical sensations, discomfort during prolonged wearing due to lack of air in the ear canal.
However, the advantages of significantly outweigh the disadvantages. In addition, the disadvantages associated only with the obvious abuse of the headset.
Criterias of choice
Despite the overall design, plenty of choice often puts the buyer in a difficult position. Among the proposed models have cheap with obvious disadvantages in the performance, mediocre sound and luxury with impeccable assembly, more sophisticated components, and therefore the best acoustics.
To properly understand the competing models and choose the headset with good performance, it is necessary to have a general idea of the selection parameters. It:
- Indicators of comfort and quality, which can be evaluated by the ear cushions material, cable form, assembly and materials used.
- Technical parameters, the list of which is standard for different types of headphones - drivers, frequency, sensitivity, resistance and so on.
type of embouchure
Execution nozzles affect the comfort in wearing, snug fit in the ear canal. Complete them usually comes a few pieces that differ in shape and size. They can be made of foam, silicone or soft plastic material:
- Foam packing the most convenient, easy to adapt to the size and characteristics of the ear canal, do not press. But they can be easily damaged, can not be cleaned and require regular replacement.
- Silicone tips are convenient, flexible enough to provide a comfortable wearing with good insulation. Easy to clean, it can be used for a long time.
- Nozzles made of soft plastic stiffer and less comfortable, but the most durable.
Cable
The cord connecting the speakers to the sound source must be long enough to measure the elastic and durable. Two types of cables are commonly used: round and flat. Flat cable is more convenient, since it is not confused, easily twists, slips less on clothes.
Build quality
Choose a good set of headphones will not work without a thorough visual inspection. They should be collected in the case of high-quality plastic, devoid of dangerous burrs. other materials can be used in the models of the premium class. The enclosure must be kept without gaps and securely taped.
driver design
The speakers can be dynamic and reinforcement. Dynamic cheaper not have high acoustic qualities. Reinforcing have a more complex structure, due to which the reproduction quality is increased.
If the question of money is not necessary, it is best to choose a good pair of headphones, and the reinforcement speakers that give superb sound with good bass.
Frequency
The range of frequencies for vnutrikanalok regardless of cost about the same - from 5 Hz to 25 kHz. This is little more audible ear norm which is from 20 to 20,000 Hz.
Resistance
For smartphones, which usually use the headphones, will choose the right headset low impedance. Impedance to 25 ohms requires less energy to sound quality. Too little resistance distorts the sound, reduce the volume too high. The best option would be a value from 20 to 25 ohms.
Power and sensitivity
Most small power connectors phones. therefore optimal headphone output is 100 mW. A low figure power source, i.e. a smartphone connector requires high sensitivity headphone. For it is intracanal 100-150 dB.
distortions
The level of outgoing sound distortion increases with the weight of the speaker. Small headphones are less susceptible to distortion. From this viewpoint, the quality of sound vnutrikanalok in any case will remain good, as their weight varies from 5 to 30 grams.
brands
Among the best-known manufacturers of headphones with a good reputation are companies that produce speakers with high-quality acoustics:
- German Sennheiser;
- Austrian AKG Acoustics;
- US Koss.
Sennheiser
The brand is aimed at the production of audio equipment. It produces all kinds of headphones - from expensive premium models to the budget. The difference in price effect on performance, but does not affect the quality of the performance.
An example may be two models:
- Sennheiser IE 80 - it is in the upper segment of the price and has good acoustic properties.
- Sennheiser CX 400-II - inexpensive headset with good performance for everyday applications.
AKG Acoustics
It produces a digital acoustic system with Hi-Fi sound. Vacuum headphones feature a stylish design, good quality and relatively low cost:
- AKG K376 - the model of the average price with excellent sound transmission and broad functionality.
- AKG K321 - an inexpensive headset with good specifications.
Koss
The company occupies a niche of budget headphones with constantly updated lineup. It produces good quality and handy vacuum dynamics:
- Koss The Plug - a model with a good sound insulation and sound balance, durable and easy to use.
- koss Mirage - Headset popular with many features and original design.
Before you buy find out the warranty period selected headphones, because even the most expensive models may fail. Therefore it is good, if in case of damage will be able to pass them under warranty.
