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ALPEN

3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

( 8 Reviews)
 
US $18.69
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What you are viewing is a 3.5mm Letter E Computer Stereo Earphone Music Headset, to enjoy music anytime and anywhere you want, you need this stereo computer headset.Made of high quality material, the In-Ear MP3 Earphone is durable and reliable for long time use! The stereo music headset is with hide substance ear cover and features ergonomic design, comfortable for wearing. With 3.5mm jack, the stereo music headset fits for most music devices! Most important, this stereo music headset is excellent in sound quality, provides great performance!Extend your personal style with this stereo music headset, best choice for you!

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  • Specifications: 

    • Speaker Diameter: Ø40.00mm
    • Speaker Frequency Response: 20Hz~ 20kHz
    • Speaker Sensitivity: -40dB±3dB
    • Speaker Impedance: 32Ω
    • Output Sound Pressure: 94dB ± 3dB
    • Plug Diameter: Ø3.5mm
    • Audio Interface: Ø3.5mm
    • Length: 1meter
    • Cable Type: Leather

    Features:

    • With letter E design and folding mount
    • 40mm design using high-fidelity speakers, excellent sound reduction
    • Plugs into standard 3.5mm audio jacks, for speaker
    • The stereo music headset features ergonomic design, comfortable for wearing
    • Sound quality thoroughly clear, perfect reduction music
    • The stereo music headset can bend and adjust at will, can rotate from multi-angle
    • The stereo music headset has a small individual tuner design, convenient and practical
    • High sensitive, fashion technology
    • Soft cushion earcup for maximum comfort

    Details:

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • The stereo computer headset is with omni-directional microphone for clear voice pick-up

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • Hide substance ear cover, the music headset features ergonomic design, comfortable for wearing

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • The music headset is with 3.5mm jack, fit for most music devices

    How does Headset Work:

    Moving-coil:

    • The moving coil driver, more commonly referred to as a "dynamic" driver is the most common type used in headphones. The operating principle consists of a stationary magnetic element affixed to the frame of the headphone which sets up a static magnetic field. The magnetic element in headphones is typically composed of ferrite or neodymium. The diaphragm, typically fabricated from lightweight,

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • High stiffness to mass ratio cellulose, polymer, carbon material, or the like, is attached to a coil of wire (voice coil) which is immersed in the static magnetic field of the stationary magnet. The diaphragm is actuated by the attached voice coil, when an audio current is passed through the coil. The alternating magnetic field produced by the current through the coil reacts against the static magnetic field in turn, causing the coil and attached diaphragm to move the air, thus producing sound. Modern moving-coil headphone drivers are derived from microphone capsule technology

    Electrostatic:

    • Electrostatic drivers consist of a thin, electrically charged diaphragm, typically a coated PET film membrane, suspended between two perforated metal plates (electrodes). The electrical sound signal is applied to the electrodes creating an electrical field; depending on the polarity of this field, the diaphragm is drawn towards one of the plates. Air is forced through the perforations; combined with a continuously changing electrical signal driving the membrane, a sound wave is generated. Electrostatic headphones are usually more expensive than moving-coil ones, and are comparatively uncommon. In addition, a special amplifier is required to amplify the signal to deflect the membrane, which often requires electrical potentials in the range of 100 to 1000 volts

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • Due to the extremely thin and light diaphragm membrane, often only a few micrometers thick, and the complete absence of moving metalwork, the frequency response of electrostatic headphones usually extends well above the audible limit of approximately 20 kHz. The high frequency response means that the low midband distortion level is maintained to the top of the audible frequency band, which is generally not the case with moving coil drivers. Also, the frequency response peakiness regularly seen in the high frequency region with moving coil drivers is absent. The result is significantly better sound quality, if designed properly
    • Electrostatic headphones are powered by anything from 100v to over 1kV, and are in proximity to a user's head. The usual method of making this safe is to limit the possible fault current to a low and safe value with resistors

    Electret:

    • An electret driver functions along the same electromechanical means as an electrostatic driver. However the electret driver has a permanent charge built into it, whereas electrostatics have the charge applied to the driver by an external generator. Electret headphones, like electrostatics are relatively uncommon. They are also typically cheaper and lower in technical capability and fidelity than electrostatics

    Balanced armature:

    • A balanced armature is a sound transducer design primarily intended to increase the electrical efficiency of the element by eliminating the stress on the diaphragm characteristic of many other magnetic transducer systems. As shown schematically in the first diagram, it consists of a moving magnetic armature that is pivoted so it can move in the field of the permanent magnet. When precisely centered in the magnetic field there is no net force on the armature, hence the term 'balanced.' As illustrated in the second diagram, when there is electric current through the coil, it magnetizes the armature one way or the other, causing it to rotate slightly one way or the other about the pivot thus moving the diaphragm to make sound

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • The design is not mechanically stable; a slight imbalance makes the armature stick to one pole of the magnet. A fairly stiff restoring force is required to hold the armature in the 'balance' position. Although this reduces its efficiency, this design can still produce more sound from less power than any other. Popularized in the 1920s as Baldwin Mica Diaphragm radio headphones, balanced armature transducers were refined during World War II for use in military 'sound-powered' telephones. Some of these achieved astonishing electro-acoustic conversion efficiencies in the range 20% to 40% for narrow bandwidth voice signals

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • Today they are typically used only in canalphones and hearing aids due to their diminutive size and low impedance. They generally are limited at the extremes of the hearing spectrum (e.g. below 20Hz and above 16kHz) and require a seal more than other types of drivers to deliver their full potential. Higher end models may employ multiple armature drivers, dividing the frequency ranges between them using a passive crossover network. A few combine an armature driver with a small moving-coil driver for increased bass output

    Other Transducer Technologies:

    • Transducer technologies employed much less commonly for headphones include the Heil Air Motion Transformer (AMT); Piezoelectric film; Ribbon planar magnetic; Magnetostriction and Plasma-ionisation. The first Heil AMT headphone was marketed by ESS Laboratories and was essentially an ESS AMT tweeter from one of the company's speakers being driven at full range. Since the turn of the century, only Precide of Switzerland have manufactured an AMT headphone. Piezoelectric film headphones were first developed by Pioneer, their two models both used a flat sheet of film which limited the maximum volume of air that could be moved. Currently TakeT produce a piezoelectric film headphone which is shaped not unlike an AMT transducer but which like the driver Precide uses for their headphones, has a variation in the size of transducer folds over the diaphragm. It additionally incorporates a two way design by its inclusion of a dedicated tweeter/supertweeter panel. The folded shape of a diaphragm allows a transducer with a larger surface area to fit within smaller space constraints. This increases the total volume of air that can be moved on each excursion of the transducer given that radiating area

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • Magnetostriction headphones, sometimes sold under the label of "Bonephones" are headphones that work via the transmission of vibrations against the side of head, transmitting the sound via bone conduction. This is particularly helpful in situations where the ears must be left unobstructed or when used by those who are deaf for reasons which do not affect the nervous apparatus of hearing

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • Magnetostriction headphones though, have greater limitations to their fidelity than conventional headphones which work via the normal workings of the ear. Additionally, there was also one attempt to market a plasma-ionisation headphone in the early 1990s by a French company called Plasmasonics. It is believed that there are no functioning examples

    How to Choose a Good Pair of Headphones?

    • Bud design. These have good sound quality and sit around the ear canal. This type of headphone also offers better bass reproduction and block out ambient noise

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • Closed cup design. These headphones can block out external noise and stops people from listening in. The downside to these headphones is that they struggle to reproduce bass and can make your ears uncomfortably hot if you wear them for long periods of time

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • Open design. They sit on the ear and let sound escape from the back. They offer the most natural sound and tend to be the most comfortable to wear
    • Noise-cancelling headphones. These generate sound waves to block out noise. The downside to this type of headphone is they tend to be effective against consistent noise

     ALPEN  3.5mm Letter E Computer Stereo Earphone Music Headset IS-R1

    • Wireless headphones. These headphones have an advantage in having no cables but some models have problems with sound/signal quality. So that's it, you are done

    Package Included:

    • 1 x Music Headset
    • 1 x Card Reader

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