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[Discussion] [Device Team] [Tech Class] Chapter 41: All we need to know about Mobile Earphones.

2018-04-25 08:55:34

2,346 24
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Hey MI Fans.
Hope You are guys enjoying this day !!!
-Today we will discuss Mobile Earphones. We use that on every single day in our life. But some of us know about Earphone in detail.
So In this Tech class, we will concentrate on the Build, Working principal, Types etc. about the device.

So let’s start,
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What is an Earphone?
  • Headphones are a pair of small loudspeaker drivers that are designed to be worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound.
  • Headphones are designed to allow a single user to listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air, for anyone nearby to hear.
  • Headphones are also known as ear speakers, earphones or, colloquially, cans. Circumaural and supra-aural headphones use a band over the top of the head to hold the speakers in place.
  • The other type, known as earbuds or earpieces consists of individual units that plug into the user's ear canal. In the context of telecommunication, a headset is a combination of headphone and microphone.
Earphones (9).jpg

How does an Earphone work?
  • A pair of closed-back earphones is sealed in the back to limit how much sound escapes when they are being used. Closed-back earphones also minimize the amount of sound that leaks to the outside, reducing sound pollution around the user.
  • Open-back earphones are open at the back, allowing some air and sound to escape. In some cases, open-back earphones have better sound quality, but it is at the cost of increased sound pollution. Open-back earphones also allow ambient noise to leak into the user's ear canal.
Smaller sizes of earphones can also be fitted with noise-canceling, soft foam earpieces that completely cover the ear canal. This method of passive noise reduction eliminates any noise escaping from the earphones to the surrounding area while isolating the user from any ambient noise leaking in.

What’s inside the earphone?
  • Back case: holds everything together. The wires run up through a hole at the bottom.
  • Front case: This is the part that faces into your ear. Sometimes it's covered with a little fabric pouch to keep it clean.
Earphones (5).jpg
  • Seal: This rubbery circle clips the front case to the back case, holding the two together.
  • Wires: Carry signals from the stereo to the speaker.
  • Magnet: The permanent magnet at the back of the speaker. This is the heaviest part of an earbud and makes up the vast majority of its weight.
  • Coil: This becomes an electromagnet when electricity flows through it.
  • Transparent plastic cone: This makes the sound when it moves.
  • What is the difference between headphone and earphone?
  • Headphones, also known as ear speakers and earphones are a small pair of loudspeakers, which are mainly designed for humans and have to be placed close to the user’s ears, in order to be used.
  • On the other hand, headsets always have a microphone that is attached to it, which allows a user to speak.
Earphones (1).jpg
Today, the earbuds versions are most commonly used. Before the amplifiers were developed, the earpieces were the only way to listen to the electrical audio signals. The first headphone was developed in 1910 by Nathaniel Baldwin.

About Earphone audio Jack.
  • A phone connector, also known as phone jack, audio jack, headphone jack or jack plug, is a family of electrical connectors typically used for analog audio signals.
  • The phone connector was invented for use in telephone switchboards in the 19th century and is still widely used.
  • The phone connector is cylindrical in shape, with a grooved tip to retain it. In its original audio configuration, it typically has two, three, four and, occasionally, five contacts. Three-contact versions are known as TRS connectors, where T stands for "tip", R stands for "ring" and S stands for "sleeve".
  • Ring contacts are typically the same diameter as the sleeve, the long shank. Similarly, two-, four- and five- contact versions are called TS, TRRS and TRRRS connectors respectively. The outside diameter of the "sleeve" conductor is 1⁄4 inch (6.35 millimeters).
  • The "mini" connector has a diameter of 3.5 mm (0.14 in) and the "sub-mini" connector has a diameter of 2.5 mm (0.098 in).

Different type of jack
  • Headphones and the devices you connect them to use three standard analog connection sizes: 1/4-inch (6.35mm), 1/8-inch (3.5mm) and 3/32-inch (2.5mm). All three sizes are interchangeable with adapters.
  • The largest is commonly referred to in standard measurements, while the smaller two are referred to in metric.
  • The larger connections have more surface area for establishing better connections and are much less prone to breaking, but there's no noticeable audio quality difference.
Earphones (8).jpg
3.5mm Connector
  • The middle-sized 3.5mm connector is the one with which you're most likely familiar. Unless specifically designed to work with home stereos or small mobile devices, headphones are going to use 3.5mm.
  • Also, computers use the 3.5mm connection standard for headphones and speakers.

1/4-Inch Connector
  • The 1/4-inch connector implies serious business, but actually, it's just the largest available headphone size. It is the official standard connector size for phones, and higher-end headphones designed for home stereo systems usually feature 1/4-inch connectors.
  • Amplifiers and recording equipment often feature the 1/4-inch connection standard as well.

2.5mm Connector

  • The 2.5mm connector is the least common of the bunch, mostly found on mobile phones, communication radios, and TTY devices.
  • Smartphones and cellular phones have gradually moved towards using the 3.5mm connection over the 2.5mm connection size.

Different types of the earphone cable.
  • A well-insulated cable will reject noise when bumped. If you’ve never experienced this, simply put on your earphones or headphones and play with the cord a bit. With other headphones, there may only be a slight noise.
  • Less noise, means you have fewer distractions when you rub against or bump the cord. Since some cords make a ton of noise when they simply rub against your clothing, this can be a very important aspect.
Earphones (6).jpg
  • "Tape" (flat wire) vs cable (round wire) in headphones and earphones
  • Durability: There is a definite difference since the cords tangle a lot lesser and are just a bit stronger.
  • Sound Quality: No noticeable difference here. The same pair of earphones using either flat or round cables would sound pretty much the same.
Aesthetics: It definitely handles much better and is easier to fold away, so it's a good step for sure.

Earphone with Mic vs without the mic.
  • If an earphone has a built-in microphone then while receiving any call, you can directly use the earphone's mic which will be very close to your mouth to talk to the other person(s). The other person's voice can be either heard through the earphones or the phone speaker.
  • If no built-in mic is present though you can pick up a call on your phone and listen to the voice on the other side through your earphones, you cannot talk through the earphone. You have to take your mouth near the phone's inbuilt microphone and talk through that.
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  • Built-in earphones have the advantage of coming handy when you are listening to any songs and you have to receive any calls. You can receive or reject calls using the microphone button provided and talk about it without having to reach for the cell phone once.
  • Of course, the built-in microphone will cost you a little more than the standard model without a mic.

How to choose the best earphone?
  • Fit and comfort
  • Portability
  • Durability
  • Cables
Earphones (7).jpg
Earphones are good for health or not?
Side Effects of Using Headphones and Earphones
  • Hearing loss/ Hearing complications
  • Ear Infections
  • No air passage
  • Numb Ears
  • Pain in Ears
  • Bad effects on Brain
  • Life-Threatening Accidents
Earphones (3).jpg

How to Save your ears and still use Earphones/Headphones

  • Avoid using tiny headphones/earphones that directly go into the ear canals. Better those big headphones, the old ones which stay outside your ears.
  • Avoid sharing your earphones/headphones with others.
  • Make sure you change the sponge cover/ rubber cover of your headphones/earphones once a month. If your earphones/headphones don’t have sponge covers, make sure you sanitize them.
  • Do not use earphones/headphones when you are traveling by car, train, metro or even walking.
  • No loud music ever when you use earphones/headphones.


A Tech Class Recap
Class 15:All CPU Cores
Class 17:All About RAM
Class 28:All About IP(Ingress Protection)Ratings
Class 32:MIMO Technology Explained
Class 33: All About Gi-Fi
Class 34: All you need to know about ADB
Class 35: All about Factory reset
Class 36: More about on Internet Protocol (IP).
Class 37: Android Voice Recognition - In Detail
Class 38: Mobile Touch panel – An Android Input
Class 39: All about Pixel Density & DPI
Class 40: Android Source code - What we need to know

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2018-04-25 08:55:34
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Grand Master Bunny

Pratyush01 | from Redmi 3S


Perfectly explained! Thank You!
2018-04-25 09:35:25
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Master Bunny

8131016561 | from MI MAX


Nice Information ,keep sharing with us.
2018-04-25 10:13:43
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Grand Master Bunny

Solver13 | from Redmi Note 4


Nicely Explained. Thanks for shareing
2018-04-25 10:17:52
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Master Bunny

shahkaran16 | from app


Thanks for sharing
2018-04-25 10:18:46
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Master Bunny

Vizard | from Redmi Note 5 pro


Nicely Explained , Great.
2018-04-25 10:36:58
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Master Bunny



good technology
2018-04-25 11:03:02
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Rookie Bunny

1723119479 | from Redmi Note 4


thanks for details...
2018-04-25 11:25:04
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Master Bunny

meetgour | from app


Well Explained :)
2018-04-25 11:25:25
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Advanced Bunny

@nkit negi | from Redmi 5A


2018-04-25 11:28:36
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Semi Pro Bunny

eon1758214943sec | from Redmi 4


really nice
2018-04-25 12:10:07
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