How Bluetooth Headset Works working of Bluetooth Earbuds Explained with 3D Animation #Bluetooth #Earbuds #earphones #bluetoothheadset
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00:00Bluetooth headset.
00:01Such a small thing contains so many high technology.
00:05It is not complicated.
00:06It mainly consists of a speaker, circuit board and a battery.
00:10Inside the speaker are various small devices for making sounds,
00:13and the circuit board is a chip for Bluetooth communication
00:17and the chip used for audio processing.
00:19Let's take a look at how the Bluetooth headset makes sound.
00:22This is a traditional musical instrument.
00:24When you hit the gong, it will make a loud sound.
00:27If you touch it with your hand, you will feel the gong vibrating.
00:31The sound is transmitted through the air.
00:33When vibrating, the air molecules will vibrate and pass to our ears.
00:38We can hear the sound.
00:39The sound can be represented by this sound wave.
00:42The higher the height of the sound wave, the louder the sound.
00:46The lower the height, the smaller the sound.
00:49Similarly, if the width of the sound wave is relatively narrow, it is high pitch.
00:54And if the width of the sound wave is relatively large, it is bass.
00:58The height and width of sound waves can be expressed in terms of amplitude and frequency,
01:03which determine the timbre of the sound.
01:05How does the speaker make sound?
01:07There is a diaphragm in front of the speaker.
01:10When the diaphragm vibrates, it transmits sound like the spiral mentioned above.
01:15In order to vibrate the diaphragm, a magnet and a voice coil are needed.
01:20The magnetic field of the magnet flows from the N pole to the S pole.
01:25When a pole conductor is energized, a magnetic field will also be generated.
01:31When the conductor is placed in a magnetic field,
01:34the magnetic field flow direction of the magnet above, and the conductor is the same,
01:39so the force on the conductor is the sum of the two.
01:42The same is true for the position below because the directions are exactly opposite.
01:46It cancels out and becomes weaker, so the conductor will move downward.
01:51There is a circular hollow magnet behind the speaker.
01:54A voice coil is placed inside the magnet.
01:57From this position, the magnetic field generated by the magnet is like this.
02:01When the voice coil is energized,
02:03it will also produce a similar magnetic field and change the current.
02:08The magnetic field of the voice coil will also change in the opposite direction.
02:13As mentioned before, the voice coil will be affected by the magnetic field.
02:18Zeroformal frequency is expressed in binary.
02:21In order to convert the sound information into numbers,
02:25we need to store the frequency of the wave as a coordinate value
02:28and put these values converted into binary data.
02:32The converted data can be transmitted via Bluetooth.
02:35When using Bluetooth, you only need to bring the Bluetooth devices close to each other.
02:40The two devices will share a unique code and verify the connection.
02:45Then put this connection code at the front when transmitting data.
02:49Through this code you can determine whether the device receiving the data
02:53is the headset you are using to avoid interference.
02:56The binary data transmitted to the headset
02:59is then converted back to an analog signal by the audio decoder on the circuit board.
03:04The analog signal comes to the speaker to produce a constantly changing electrical signal.
03:10The speaker can produce beautiful sound by constantly moving the voice coil.
03:15Thanks for watching like comment share and subscribe