## Here you find out what RF Communication is

Radio frequency (often abbreviated as, RF), can be described as any frequency within the electromagnetic spectrum with radio wave propagation that lie in the range extending from about 3 kHz to 300 GHz; this includes the frequencies that are used for communications or the radar signals. That said, you should know that RF generally refers to electrical rather than the mechanical oscillations.

RF communication utilizes radio waves rather than wires to exchange signals, and this is where the term “wireless communication,” comes from. RF modules generally use frequencies to distinguish the different radio signals, therefore, in order for the RF modules to communicate, they have to be operating on the same exact frequency. That said, you should know that radio frequency is normally measured in units known as hertz (abbreviated as Hz), which represent number of cycles/second when the radio wave(s) is transmitted. 1 hertz (Hz) equals 1 cycle/second, and 1 megahertz (abbreviated as, MHz) equals 1 million cycles/second.

Frequency normally refers to the oscillation rate of the radio waves. It can also refer to how close together or far apart the waves are. When the radio waves are too far apart, that is known as low frequency, and when the radio waves are close together, that is known as high frequency. That said, you should know that radio frequency propagation happens at speed of light, and doesn’t need any medium (such as air) in order for it to travel. Radio frequency waves occur naturally from lightning, the sun flares, and even from stars which radiate radio frequency waves as the get older. However, people usually communicate with man made radio waves which oscillate at various select frequencies.

The man made radio frequency waves are produced by oscillating current for a certain number of times, and radiating it off the conductor (which is referred to as the antenna), into an empty space (this is the space that’s occupied by air and not the outer space), as electromagnetic radio waves. The RF signals are received and sent using conductors via the phenomenon that’s called the skin effect, where radio frequency current latches itself and then flows through the conductors’ surface; this effect is actually the basis and the core of radio technology.

The best thing about RF communication, is that it’s omnipresent (that is to mean it’s all around us). It plays a crucial role in many of the communications systems which we depend on a daily basis, such as fire and police radio systems, TV and radio broadcasts, and satellite communications. Cordless phones, cellphones, Wireless internet (Wi Fi), and Bluetooth also operate in the radio frequency spectrum. In addition to that, there are other appliances outside of the communications field that use RF. They include; microwave ovens, garage door openers, among others. Some wireless devices such as TV remote controls, cordless computer mice, computer keyboards, and even 2 way radios also operate using RF frequency .

Two way radios are based on the RF frequency and they perform group communication using minimum radio frequency channel resources. This is to mean that if all the users are in the same location or area (most of the time), you will only need a single channel resource in order to talk to them. By using RF, two way radios have the capability of facilitating âone to manyâ group communication (which is also known as a group call), very efficiently. By efficient, I mean that 1 user can communicate/talk to 1, 5, 10, 100 or even 1000’s of users at a go. The two way radio user doesnât need to keep on repeating the same message if he/she needs to convey to many users.

## Yankees Joe Girardi believes earpieces would help speed up pace of play

Here is the UK we commonly see coaches and physios on the football (soccer) bench wearing earpieces to communicate with each other, But this Baseball Coach wants to give the players an earpiece to improve player-to-coach communications. His argument is good, but will he be allowed?

Earlier in the week, Major League Baseball elected toÂ remove the four-pitch sequence of the intentional walkÂ from the game in order to speed up the pace of play. On Thursday, New York Yankees manager Joe Girardi threw his two cents into the ring regarding the current pace of play.

However, the veteran skipper did not comment on the recent rule change surrounding the intentional walk but rather the potential for hitters to wearÂ an earpiece similar to that of NFL quarterbacks.

âAs far as the pace of the game I am a big proponent of trying to introduce some type of communication through headphones like they do in the NFL,Â Girardi said on Wednesday at George M. Steinbrenner Field. âI think you can speed the game up that way.

In the NFL, quarterbacks areÂ notorious for having a speaker inside their helmet while players on the defensive side of the football now have such technology in their helmets as well.

âYou put earpieces in certain people,â he added. âRealistically you could put it in your hitters helmets and you could say what you wanted. Then its not a sign from me to the third base coach and a sign to the player. Instead of catchers always going out to change signs they could do it through communication. I think you could speed the game up a lot that way. The thing about signs is that signs take time and it slows it down.

However, many have argued that the removal of the four-pitch intentional walk was also parting ways with the potential for human error. Wouldnt the same be true for the lack of signs if Girardis earpiece system were implemented?

A player can very easily misinterpret a sign along the way, which could cause a difference in the game due to human error. Although many fans and people outside of the game would probably have less of an opinion regarding the managers new approach, it is nearly impossible to make everyone happy these days.

## Maplewood-based 3M launches ‘smart’-hearing protection for hunters, civilian shooters

We all understand the difference between active headset and passive headsets? Active is able to block external sound when it reaches a certain decibel level. This is great in most situations, but for hunters and people that work around guns this sometimes isnât as protective as it could be, But now 3M have launched a new âsmart hearingâ Headset

Determined to expand its consumer safety offerings, 3M Co. has introduced a “smart” hearing-protection headset for hunters and shooters that automatically measures and cancels out specific gun noises while simultaneously amplifying voices and phone conversations.

3M’s device, the Peltor Sport Electronic Hearing Protector, was introduced last week with positive reaction at the National Shooting Sports Foundation’s SHOT Show in Las Vegas.

The technology is designed to offer superior hearing protection to hunters, firing-range hobbyists and other civilian sports shooters.

While 3M is well known for making ear plugs and other hearing protectors for factories, farms and the military, the new Peltor product is expected to greatly expand its reach into the civilian shooting market.

It is also 3M’s first foray into the adjustable or “smart” hearing-technology arena, officials said.

For the first time, 3M’s new devices can measure the energy coming from each specific gunshot in the area and automatically adjust to suppress each noise for the right amount of time.

Such automatic adjustments protect the hearing, no matter if shooters who are nearby are firing small .22-caliber firearms or automatic rifles, said Lindsay Adams, 3M’s marketing manager for the Peltor Sport line.

The new Peltor Sport headsets also filter out sound from fans, wind and other background noises while amplifying voices.

Shooters don’t need to remove headsets to talk on a cellphone or to hear the people around them. Instead, the technology attempts to make ear protection seamless and constant even if the shooter’s environment changes from inside to outside.

“Hunters need to be able to hear their surroundings,” Adams said.

It took 3M more than a year and eight electronic and mechanical engineers and marketers to produce the new products.

If successful, the Peltor Sport headsets will double and triple 3M’s current protection sales from the hunting and shooting consumer market.

3M has a solid footing in hearing protection in the construction market via channels such as Home Depot and Lowes.

Now, 3M hopes for similar success as it launches the new smart Peltor Sport line in Gander Mountain and Bass Pro Shops and on Walmart.com and Amazon.com.

3M launched two versions of its new Peltor headset at the SHOT show. Attendees were able to borrow 3M’s headsets and test them during the preshow firing range event and gave rave reviews.

Unlike previous models, the Peltor Tactical 500 model is Bluetooth capable and offers a noise-reduction rating of 26. The Tactical 300 model is compatible with other mobile devices and offers a noise-reduction rating of 24.

Noise reduction ratings generally range from 0 to 34. The higher the number, the better the noise cancellation.

The new products are expected to sell for roughly \$149.99 and \$199.99.

“We really feel like these, along with the products we developed in the last two years, round out our portfolio and put us in a competitive position to gain market share,” Adams said.

Both new electronic hearing protectors also feature foldable vented headbands that can release heat and increase comfort.

They sport low-profile cups with rubber bumpers and durable recessed microphones to reduce wind noise.

3M officials declined to reveal the cost to bring the new product to market.

The company does, however, expect the investment to pay off.

Industry analysts agreed, noting that the Maplewood based maker of Scotch tape, respirators, ear plugs, goggles and harnesses has its sight set on a growing market.

Global Industry Analysts Inc. predicts that U.S. hearing-protection sales will grow on average 6 percent a year and reach \$714 million by 2020.

Some of that growth will be fueled by regulations and changing hearing-protection needs in workplaces such as factories, oil fields and farms.

If correct, that bodes well for 3M and Honeywell Inc., the two largest players in the nation, followed by SensGard, Westone, Moldex Metrics and David Clark Co. Inc.