Radio Earphone
How does an earphone work as an antenna?
Walkmans, handphones and Mp3 players usually needs you to use an earphone to listen to the radio. And they said that the earphone works as the antenna. Can someone explain how that works?
It isn’t the earphones that act as an antenna – it’s the leads leading to the earphones. You can check this out for yourself by listening to an FM station and raising or lowering the leads – the signal will get either stronger or weaker/distorted. There’s a simple (probably capacitive) coupling from one of the lead wires, to the RF side of the Walkman or whatever you have. The coil inside the earpiece is the earpiece’s ‘miniature speaker’ coil.
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Covert Earpiece Earphone for Motorola VISAR Radio $4.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Covert Acoustic Tube Earphone for Motorola Ham Radio $5.99 |
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KAWAMALL 2-Wire VOX Earphone w/ Acoustic Tube Mic for Kenwood Radios $19.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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2-Wire Earphone for Kenwood Ham Radios w/ separate PTT $14.95 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Covert Acoustic Tube Earphone for Motorola Ham Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Ear Hanger 2 Pins Earphone Headset for Kenwood TK Radio $6.31 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Covert Acoustic Tube Earphone for Motorola Ham Radio $5.99 |
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Woven Cord Earphone 2 Pin for Kenwood Two Way Radios $5.16 |
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Fabric Covered Cable Two Way Radio Earphone for Kenwood $4.57 |
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Black Two Way Radio Earphone PTT Microphone for Kenwood $8.61 |
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Single Coiled Cable Two Way Radio Earphone for Kenwood $5.41 |
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Military Earphone with microphone for Motorola 2 way radio GP140 GP680 GP320 640 $15.99 |
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Noise cancelling Mic Earphone for Motorola radio CT150 CT450 CT250 P040 P080 110 $12.00 |
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Earpiece earphone Motorola two way radio 2 pin plug $7.99 |
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Two Way Radio Earphone w Mic Microphone for Kenwood $5.44 |
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Covert Acoustic Tube Earphone for Kenwood Two-Way Radio $5.99 |
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Two Way Radio Single Earphone Black for Kenwood TK3107 $8.80 |
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PTT Button Two Way Radio Blk Earphone w Mic for Kenwood $5.63 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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PTT 6 Pin Plug Headset Earphone for Motorola 328 Radios $11.92 |
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Black Two Way Radio Earphone w Mic for Motorola GP2000 $5.36 |
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Replacing 2 Pin Earphone 1.2M for Kenwood TK3207 Radios $9.13 |
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Earpiece earphone Motorola two way radio 2 pin plug $7.99 |
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Headset Earphone Red Clear for Kenwood TK Two Way Radio $5.46 |
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Motorcycle Helmet Earphone Mic Black for Motorola Radio $24.41 |
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1.2M Cable Clip Mic Earphone for Motorola Two Way Radio $4.62 |
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2 Pin Plug Black Single Earphone for Icom Two Way Radio $9.15 |
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Walkie Takkie Two Way Radio Single Earphone for Kenwood $5.07 |
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Microphone Earphone Clear Tube for Icom Two Way Radio $10.00 |
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Microphone Earphone Clear Tube for Talkabout 2Way Radio $9.00 |
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Microphone Earphone Clear Tube for Icom 2 Way Radios $9.00 |
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1.1m Lenght 2 Pin Earphone for Motorola Two Way Radio $4.80 |
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For Kenwood TK Types 2 Way Radio Earphone w Hanger $7.41 |
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1.1m Lenght 2 Pin Earphone for Motorola Two Way Radio $4.68 |
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Black Ear Hanger Mic Earphone 2 Pin for Motorola Radio $4.93 |
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In Ear Earphone Microphone for Motorola Two Way Radio $8.10 |
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Black Single Side Two Way Radio Earphone for Kenwood $5.48 |
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Black Single Wire Earphone for Motorola Two Way Radio $4.79 |
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Black Two Way Radio Earphone PTT Microphone for Kenwood $4.93 |
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Two Way Radio Single Earphone Black for Kenwood TK3107 $9.27 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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PTT 6 Pin Plug Headset Earphone for Motorola 328 Radios $12.10 |
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Two Way Radio Microphone Earphone for Motorola GP88s $5.52 |
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1.1M Length 2 Pin Mic Earphone Black for Motorola Radio $4.78 |
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Black Ear Hanger Mic Earphone 2 Pin for Motorola Radio $4.49 |
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PTT Single Hook Earphone for Kenwood TK Two-way Radios $6.05 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Headset Earphone Red Clear for Kenwood TK Two Way Radio $6.03 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Single Earphone Black w Clip for Motorola Two Way Radio $4.67 |
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Covert Acoustic Tube Earphone for Kenwood Two-Way Radio $0.99 |
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Earpiece Earphone Headset for Motorola Radio (2pin) $7.99 |
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Covert Acoustic Tube Earphone for Motorola Ham Radio $0.99 |
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Earpiece Earphone Headset for Motorola Radio (2pin) $8.99 |
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Earpiece Earphone for Motorola Radio TLKR-T5,TLKR-T7,T4 $8.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Two-Pin Covert Acoustic Tube Earphone For ICOM Radio $5.99 |
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Earpiece earphone Motorola two way radio 2 pin plug $7.99 |
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Puxing PX-777 400-470Mhz UHF 2-way radio PTT Earphone $69.90 |
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Ear-Hanger Earphone Earpiece for Kenwood 2-Way Radio TK-2107 TK3207 TH-F6A TH-F7 $2.50 |
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In Ear Earphone Microphone for Motorola Two Way Radio $5.14 |
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Fabric Covered Cable Two Way Radio Earphone w Mic for Motorola $8.16 |
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Mic Earphone for Wouxun Handheld radio KG-UVD1P KG679 KG689E KG699 KG816 KG-UV6D $7.90 |
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4pcs ear bud 4 Motorola Kenwood Icom radio earphone 042 $3.90 |
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4pcs ear bud 4 Motorola Kenwood Icom radio earphone 041 $6.90 |
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Ear Hook Two Way Radio Earphone w PTT Mic for Kenwood $8.06 |
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Motorcycle Helmet Earphone Microphone for Kenwood Radio $24.40 |
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ARMSTRONG ONE TUBE SET RADIO KIT WITH EARPHONE – CRYSTAL MAN $53.95 |
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1.2M Cable Clip Mic Earphone for Motorola Two Way Radio $5.16 |
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2 wire earphone 4 Motorola radio GP328 plus GP338 plus $16.00 |
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Black Single Wire Earphone for Motorola Two Way Radio $4.68 |
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2 Pin Covert Acoustic Tube Earphone Earpiece for KENWOOD Radios KPG TH TK HYT $4.69 |
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NEW Motorola GP300 P110 Radio PTT Mic Earphone Earpiece Surveillance Style $19.90 |
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Covert Acoustic Tube Earphone for Motorola Ham Radio $1.00 |
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In Ear Earphone Microphone for Motorola Two Way Radio $5.17 |
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5x 2 Pin 2 Wire Surveillance Earphone Mic Earpiece for Motorola radios $55.00 |
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Radio Acoustic Tube Earphone for KG-679 KG-689 KG-UVD1P $3.70 |
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EARBUD EARPHONE SPEAKER 3.5MM PLUG FOR USE WITH SCANNERS CB’S CB RADIO, ETC ~NEW $3.99 |
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2 PIN Ear Earphone Earpiece headset FOR MOTOROLA Radio $4.76 |
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3.5mm Jack Two Way Radio Black Earphone for Yaesu VX160 $8.40 |
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100X Ear Sponge for Radio MP3 ear phone (100 pieces) $27.99 |
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20X Ear Sponge for Radio MP3 ear phone (20 pieces) $14.98 |
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Single Ear Hanger Earphone for Kenwood Two Way Radio $5.09 |
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New Walkie Talkie Two Way Radio Earhook Earphone with Clip Microphone $4.67 |
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Earpiece / Earphone / Headset for Motorola Radio [2pin] $15.01 |
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Ear Hanger 2 Pins Earphone Headset for Kenwood TK Radio $6.28 |
Bluetooth Earphones- Plug and Play Without the Plug!
Short of being wireless and very low power draw (meaning that a set of Bluetooth earphones can last for hours upon hours), the greatest thing about any Bluetooth device is in without a shadow of a doubt its universal compatibility. Bluetooth and its various technologies are overseen by the BSIG (Bluetooth Special Interest Group), which is a privately held trade association made up of telecommunications, computing, networking, and consumer electronics companies and is used by everyone, having become the standard in short range wireless communication. This means that Bluetooth earphones will be compatible with more than just a few devices, and as is the nature of the technology, could be set up by a monkey.
To understand how a pair of Bluetooth earphones really works almost requires a degree in electronic engineering, for the consumer however, that kind of depth isn’t necessary. How many people know every tiny in and out of how their motor vehicle works? Bluetooth is the name given to a collection of frequency-hopping spread spectrum short-range radio frequency 2.4ghz bandwidth protocols, and I promise that’s as technical as I’m going to get. In short, Bluetooth technology allows one device to connect to several others, overcoming compatibility problems other devices and such are often plagued by. A pair of Bluetooth earphones will thus be compatible with many different devices. However, its functionality may be limited depending on what “stack”, or group of protocols the intended device has.
In order to properly utilise a pair of Bluetooth earphones, the device your using it with will most importantly need A2DP (Advanced Audio Distribution Profile), in order to transfer quality mono OR stereo sound to your headset. Many Bluetooth earphones will also support AVRCP (Audio/Video Remote Control Profile) AVRCP is designed to provide a standard interface for controlling various electronic devices. If your device also supports this profile it means that you will be able to control various functions (such as skip tracks forwards and backwards, play, pause and device volume), from your earphones.
Some Bluetooth earphones, made specifically to cater for the now fast growing media player combination phone and even personal organiser market, will also incorporate HSP (HeadSet Profile) and/or HFP (Hands Free Profile). This means that if you want to, you can also use a pair of Bluetooth earphones to make and receive phone calls, on the same device, or another. In fact, if you have a compatible headset and you’re listening to music when your phone rings, your device will ring, and then switch to the phone call when u answer it!
The future is electronic, digital, paperless, wireless, automatic and easy…….or so we keep getting told. Bluetooth earphones are a technology that contributes towards achieving this fantasy destination. Unless you’ve been living under a rock in a cave on a deserted island in the middle of a sparsely travelled ocean on a distant planet in a galaxy far far away in another dimension and time; chances are Bluetooth technology is a part of your life, whether you know it or not. If you own a mobile phone (which you could use Bluetooth earphones with), you have at least one Bluetooth device in your life, and the technology is now being utilised across any industry that has a reliance on technology. That is to say, almost all of them.
About the Author
Benjamin van de Weyer http://www.bluetooth-stereo.com/
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