Personal Audio

Electromagnets are created when a copper wire is wrapped around either an iron core, or an air core (in which case it's called a solenoid), and a current is run through it. The electrical current...

Radio stations around the world provide people with more than just music. Hearing the familiar voice of a disc jockey can make you feel as if you are talking with an old friend. The ability of...

Radio-controlled clocks are clocks with radios in them. The radio picks up time signals from the National Institute of Standards and Technology (NIST) radio station in Boulder, Colorado. The radio...

White noise is the hissing static you hear in between radio station signals and when a television station goes out on an antenna-based TV. If you are recording audio in a room, you may want to add...

GMRS radio makers claim all kinds of ranges, from ten to thirty miles or more. Here is how to get realistically good range from your GMRS or FRS radio.

Old tube radios are sometimes converted into amps for a few purposes: one being to make guitar amplifiers, and another as a makeshift public address system. Many vintage radios already have most...

Monitoring radio traffic of the emergency services using a radio scanner can be fun, informative, and help you appreciate the job that first responders to. However, you need to make sure you do it...

The Philips GoGear is a portable audio and video player. It includes a built-in microphone and FM radio tuner, allowing the user to record radio broadcasts directly to the player. Charging up your...

A VHF radio can be used to both listen to broadcast material or to communicate with other individuals. As long as another person carrying a VHF radio is within range and on the correct frequency,...

Professionals and amateurs have used a uniform set of procedures for non-commercial radio communication since the early 20th century. These procedures are in place to improve the overall efficacy...

Not many people realize that they can take their existing car radios and convert them for use with an MP3 player. Your car's radio doesn't have to come with an iPod dock or anything of that...

C. Crane, based in Fortuna, California, has been operating for 30 years. Its radio product line includes AM/FM, shortwave, Wi-Fi Internet and High definition (HD). The AM reception on the...

The Zune is a portable audio player similar to Apple's iPod. The Zune, which is produced by Microsoft,.has several notable advantages and disadvantages compared to other portable players.

JVC CD players allow users to listen to CDs and the radio from one standalone unit. Switching between the functions of the player is easy with well marked buttons on the device and through the...

The citizen band (CB) radio, which uses frequencies between shortwave and the 10-meter amateur bands, was established by law in 1949. The "RF Gain" control on a CB radio allows you to adjust the...

How many times have you driven someplace new and wanted to hear a particular kind of music? The problem is you don't know where to look. Scanning through the entire FM radio spectrum can be...

Ultra high frequency (UHF) is the radio frequency between 300 megahertz and 3 gigahertz (3,000 megahertz) or from 1 to 10 decimeters (10 centimeter to 1 meter). UHF is most widely known as the...

Apple's iPod Nano has an exceptional concept for its built-in FM radio in that you can tag songs you like and preview or purchase them when you are next syncing your device to iTunes. The radio...

The iPod has been the leader in personal audio technology for the past few years, changing the way we interact with music. One place where the iPod has fallen short has been the lack of a built...

The internet these days offers many internet radio stations where you can listen to your favorite music. Internet radio stations like Pandora, lastfm and imeem have become very popular because...

Did you know that you can pause live radio on the newest iPod Nanos? Similar to pausing television using a DVR, the iPod Nano actually records the radio signal and will allow you to pause and...

A Radio Remote is a device that connects to an iPod and allows the user to listen to local and nationally syndicated radio stations. When the iPod Touch was first announced, there were no Radio...

The SanDisk Sansa line of MP3 players offers you a wide range of portable music devices capable of playing your favorite songs no matter where in the world you are. Some Sansa MP3 players actually...

AM radio broadcasting uses amplitude modulation. Because of AM radio's low frequency and clarity, it mainly broadcasts news, talk radio and sports shows. AM radio signals are disrupted by tall,...

A NOAA radio can help keep you safe in severe weather. Although the National Oceanic and Atmospheric Administration does not endorse a particular brand, the Midland WR-100 weather radio receives...

One of the disadvantages of using a stand-alone scanner radio is that you have to be within radio reception range of the transmitter. Well, what if you want to hear police, fire or other...

Alarm clocks have awakened us ever since they were first patented in 1847. Today, modern alarm clocks have digital components that replace mainsprings with batteries and swap clockwork for circuit...

When a sound is first played, it is picked up by a microphone and translated into a sine wave that represents the sound. The carrier waves start out with no information inscribed in them until...

The Hallicrafters Company produced some of the most desirable amateur communication radios of the 1930s, '40s and '50s. Hallicrafters produced the classic SX-28, SX-42 and SX-101 communication...

In the world of sound design, Fisher stereos loom large. Fisher Radio produced high-end stereo receivers that utilized state-of-the-art technology and beckoned the era of high-fidelity sound.

The iTrip is a portable device that can be connected to a music player such as an iPod or MP3 player that broadcasts music to external speakers through a radio. This device provides the...

The Maxell MP3 FM Radio Transmitter is an easy way for you to play music off your MP3 player through your regular car radio without having to install anything. The transmitter is able to turn your...

The iCarPlay by Monster is an FM transmitter that allows you to play music from your iPod through your car's built-in radio. The wireless transmitter can be a useful way to play MP3s in your car...

The Roger Beep is also sometimes called the Talk Confirmation Tone or End-of-Transmit Tone. It's the beep the Family Radio Service (FRS) device makes when it finishes transmitting. It is carried...

Radio communication is among the easiest forms of communication to produce and can be the most useful method of communication in times of area-wide trouble. The phenomenon has been with us for...

A VHF radio is a two-way radio that is often used on watercraft to send and receive messages. It operates on a high frequency and is sometimes used in satellite communication. Problems can occur...

Radio communication is the process by which radio signals are produced, processed, and then transmitted to a radio unit. Radio communication derives its roots from the telegraph machine, when in...

Communication using radio waves has been possible and popular since Guglielmo Marconi's invention of the first practical radio transmitter and receiver in 1895. Although in many ways, radio...

Much of the world is still not wired for the Internet and is far enough away from cellular towers that digital cellular data communications are either unavailable or unreliable. And satellite data...

The Griffin iTrip is a small accessory for an Apple iPod, but produces big sound. When plugged into the audio output socket of any iPod (except the Shuffle)--usually where the headphones are...

Wireless earplugs are tiny electronic devices that are similar to a standard set of earplugs you would use with a portable CD or MP3 player. The main difference is that there is no cord or wire...

Yaesu hand-held scanners are used by ham radio users. Following these steps, you can program one of the most common Yaesu models, the VX-170 radio/scanner. With the vast array of scanners and...

The radio's playing your favorite song, but before long, you just want to pick it up and toss it at the wall. The reason? You can't hear the song because of the static! Static is one of the...

In the early 1990s, British inventor Trevor Baylis saw a television program about the spread of AIDS in Africa. The program discussed halting the spread of the disease through educational radio...

If you own an iPod or other personal music player, you might wonder how you can get it to play through your car stereo if you don't have an auxillary input. Fortunately, devices exist that can...

The purpose of a radio frequency (RF) modulator is to manipulate information encoded onto a carrier wave. Many of our technological gadgets--like video cameras, radios, and televisions--can...

Radio broadcasting is the ability to send audio from place to place by using radio waves instead of wires. It was the popularity of another form of communication that helped lead to the discovery...

WXYC in Chapel Hill, North Carolina, was the first radio station to broadcast its signal online. Since its 1994 debut, Internet radio has grown into a multimillion dollar industry with more than...

The term "cordless headphones" generally refers to headphones that operate using a radio transmitter and set of headphones with built-in radio receiver. The transmitter sends a radio wave version...

The iPod FM transmitter allows you to wirelessly play your iPod's music through the radio in your car. The device plugs into your iPod and then transmits a signal to an FM radio frequency. It...