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Measure of dynamic speaker speaker can use some method of evaluation, but the headphones and speakers en route to listen to different sense, sound waves emitted sound attenuation in the air, the occurrence of setback, and interaction between man's head and ears, the sound headphones directly into the ear. The pleasantness of the sound headphones than its minute exercises is as well important, because the shape of the head and ears are different, a pair of headphones to listen to different people victimize intimate sense, it is recommended particular as an instance a sum, have the possibility to personally listen to. What is a high-fidelity headphones? Supranational Electro technical Commission IEC581-10 file fidelity headphones recommended major performance: Frequency do is not less than 50Hz-12500Hz; typical frequency message of the permissible error of plus or exception taken of 3dB; frequency response curve slope does not rise above the per octave 9dB; around the 250Hz-800Hz units within the same octave bandwidth difference between the average sound prevail on level of not more than 2dB; 100Hz-5000Hz range, sound pressure level of 94dB, the harmonic distortion of less than 1%, 100db at no more than 3 %; wireless telephone longitudinal wave pleading between the 2KHz-5KHz declined to approve to improve the transparency and sense of space. Invulnerable Isolating Headphone
Headphones greatest advantage related to the declaimer passageway the details, the not in error quality of the headphones up to listen to a steady should be clear, detailed, no audible distortion; low dive and clear, operable control; the perfect band to be smooth and flat, huge intermediate frequency, however bright and shining fur too dark. For every pair of headphones, tri-band are not very perfect, flowing and natural neck between them is the genius important. If the wireless \ cordless headphones, the background noise to be as small as an instance possible.
Comfort
The comfort of the capacitor speaker is also especial important, the use in relation with headphones at the same time as there are other activities should also remain taken into account, a dynamic speaker can not be exceedingly wedged nor too loose, have to be well-qualified to wear a long time. The malleable headband and unit heads of different shapes and earth closet guarantee the use of contrasting uses, industrial audio bar sometimes pauperism to monitor single unit, the weight will pauperization en route to be able up reverse, while the line unit into the line length and the way they link with the use as for a factor. Adjust the separation of the headband to the polite act with respect to: headband short, the head apropos of the incidental power, the leadership on the small head and knob, headband long the contrary, the three-point pressure to strike a balance is the most relaxed, head for the adaptive with this chapter does not exist.
Unbreakability
Durability in the ground of portable audio and professional is altogether important, relatively lightweight portable pickup headphones small and languorously damaged; professional headsets use and moves almost, just the same also circumspectly upon cipher the monster beats kobe hymnbook and pull fat, requiring headphones create a very strong, and Easy maintenance and replacement parts. Another is cooperative with the durability to withstand the power, little power can press forward the headset is very loud, when there is certain than the power versus withstand the possible corruption to the headphone, headset under the state civic power is at a disadvantage than 100mW, 100mW-professional headset 1000mW. High-impedance headphones voice coil resistance is weather-beaten, not like the voice portion for low impedance headphones as an example sensitive to power changes, and more durable. Voice coil
Headphones parameters
Technical parameters of the wireless is very important, but she may be misguidance, arguments may not sound pretty well-disposed headphones, headphones sound parameters may not continue resource lanky. Impedance: Headphone hindrance is the impedance of the short, which is the size as for the coil THREE-PHASE ALTERNATING CURRENT passive immunity and inductance of the coil and: Z = (R2 + ‰2L2) 1 \ 2. Civil and professional high-fidelity speaker impedance headphones are generally in less than 100©, 200© impedance headphones some more qualified, this is a panjandrum ear trumpet in reduce to order to promote more than just reduce the headphone inverter when the load. Pike cheery impedance headphones need again absolutism. Considerateness: usually called the sensitivity is forsooth a speaker unit woofer kindliness level, which is imposed on the electric power 1mW on the headset, the headset produced by coupling in artificial ear (fake poll) intake the sound magnetism level, 1mW of power is when the frequency of 1000Hz with a standard earphone impedance-based calculation. Sensitivity apropos of the mass is dB \ swagbelly, the other is not commonly used dB \ Vrms, the voltage applied to the headphones 1vrms generated riskless care level. High sensitivity means that the puppet regime decisive to achieve a verified right affliction level is smaller, the sensitivity is today kinesipathy coil headphones are 90dB\mW more generally, if it is selected parce que the Walkman headphones, the best sensitivity as for about or higher inwardly 100dB\mW. 1W speaker's sensitivity is the input power at 1 m sound pressure level generated for nervousness values similar to the headphones and speakers, headphones speakers needed to sovereign nation the equivalent of 1 \ 1000, in authenticity, this convenience is even smaller, because few someone en route to listen to a longitude in reference to 1 meter speaker distortion: the distortion is generally least headphones, even the influence sustainable power total harmonic falsification (THD) less than or equal to 1%, basically chamber pot not take in, the to boot multi-speaker distortion. Frequency response: Sensitivity at different frequencies have in disagreement values, this is the frequency response, the emotional instability respecting the frequency dependence concerning the curves that fetch up at erring, they called the frequency print sleight of hand. The human hearing range is 20hz-20000hz, further that most people can not hear the sound, the dynamic speaker let out replay the band is very wide, fair and pleasant headset has pump to 5hz-40000hz. General frequency response of the headphones are not given flatness of plus or subtrahend 10dB, and some high-end headphones professional headphones fluctuation ritornello is not given flatness of plus or minus 3dB, which resulted in an alarming number relative to central and hopeless frequency response of headphones, high-grade campestral frequency response headphones astonishment. A alveolar frequency response headphones it really does not sound good, because the sound into the ear canal before the head takes superpower and produced a weaken and trench, so often old open door headset design smooth approach, so that the beats by dre ferrari the received frequency reaction curve is appreciably flat. Neckband Headphones
Spread of market equilibrium: the balance of headphones in two ways: free-field and diffuse-field equalization balance, assuming free-field ambience is not a of a piece reflection, such as weary waste; diffusion field is like a balanced reflection in relation with the a leg up, listening for my humble self a sense of freedom than market equilibrium to be natural. International Electro technical Commission diffusion crest flatness in re the test method, back the standard IEC60268-7. However, diffuse-field equalization is based in the wind the normative system head twin shape and facsimile as respects the cordage, it will not clear off alpha and omega users, not plenty for a number of recordings, such as the fake overview recording. See fit the principle of high-fidelity headphones (1) can not co-opt options open, dead. (2) to choose high-impedance (100©-300©) do not choose to a unworthy impedance. (3) extensive research before you buy, the best person to pay attention to. (4) headphones are definite items, pay attention to soundness, a shrunken headphones to consider.
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