Transmitter Bluetooth
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US $320.00
Music Without Cords? - The Latest Generation Of Wireless Audio Transmitters
Over the years a whole array of wireless audio transmitters have emerged which are supposed to eliminate the cables at home when connecting audio equipment. We will examine the influence of new technologies on the performance of these devices. In addition, we'll investigate if they keep their promise of removing the cable clutter.
Wireless transmission of music has begun with the launch of commercial radio broadcasts several decades ago. While still being popular today, FM radio is now being substituted by modern technologies including HD radio, satellite radio and DAB broadcasts. Today a multitude of consumer devices exist such as wireless microphones, wireless surround sound kits, Bluetooth audio transmitters, baby monitors etc which cut the cord by transmitting audio wirelessly.
Many homes which are not wired for audio are perfect for using wireless audio to distribute music throughout the home. We will look at the advantages and drawbacks of today's wireless audio technologies.
Let’s look at the most traditional technology first: FM broadcasts. FM audio transmitters send the audio by using a high-frequency signal which is constantly changing in frequency according to the audio signal. This technique is called frequency modulation or FM for short. The biggest advantage of FM transmitters is their simpleness and thus cost as well as range. As a consequence, the majority of today’s 900 MHz wireless headphones utilize FM transmission. However, FM has some major drawbacks.
The first problem is the fact that the transmission will pick up noise and thus there will be some hiss or static. The amount of noise will actually vary based on the location of the radio or receiver. FM radio waves are often reflected by walls and obstacles. This will cause several components to cancel each other out therefore causing a varying signal quality in different locations. This phenomenon is known as multipath fading. Using two antennae is one technique some devices use to cope with this problem (diversity receivers). FM radios will easily pick up interference from other consumer devices which is another difficulty.
Bluetooth based audio transmitters have gained popularity lately. Bluetooth is a common wireless protocol which was designed primarily as an interface between computer peripheral products. Bluetooth audio transmitters will convert the audio signal to digital information and then transmit via the Bluetooth protocol. Bluetooth is fairly robust in terms of interference and is well standardized. Bluetooth, on the other hand, has some problems in regard to wireless audio because it was not designed for wireless audio originally. The range of the transmission is only 30 ft or less. In addition, Bluetooth does not have enough room to transmit an uncompressed CD-quality audio signal. Therefore the audio is compressed prior to the transmission. As a result of the audio compression, the audio quality will decrease. Another drawback is that Bluetooth will cause a delay or latency to the signal during the broadcast. This delay is a particular problem for video and surround sound applications. In these applications the sound from the wireless speakers would be out of sync with the video and remaining speakers.
The technologies used for satellite radio and terrestrial digital radio offer high range. However, they also use extensive audio compression. Further, a delay of up to several seconds is introduced.
Another technology transmits the audio signal without compression digitally. This technology is used in wireless audio transmitters from Amphony. The audio signal will retain CD quality because no audio compression is used. This technology offers an audio latency of less than 1 ms. Consequently these transmitters can be used for wireless speaker kits in a home theater setup and other real-time applications.
This technology is fairly robust against radio interference from other wireless transmitters by using a technique known as forward error correction. Rather than using the crowded 900 MHz and 2.4 GHz frequency bands, Amphony products operate at 5.8 GHz and thus offer high robustness. In contrast to Bluetooth, any number of wireless receivers can operate from a single wireless audio transmitter which is a concern when distributing audio to numerous rooms within a residence.
Do u need a bluetooth transmitter to use Sony bluetooth headsets wit ipod touch?
do i need to buy a transmitter to use http://www.sonystyle.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10551&storeId=10151&langId=-1&productId=8198552921665095522 with an ipod touch?
no
Griffin's Beacon universal remote control system now available for Android, ships for $70 (Engadget)
It's been quite a while since we got our hands on Griffin's Beacon universal
remote control, way back at CES. The IR converter has since hit the market for
iOS users, but the Android community, until recently, had been left in the
dark. That changed yesterday, however, when Griffin announced that its wire-
free system is now available for Google-powered handsets and tablets. The
transmitter, fueled by a quartet of AA batteries, converts an Android device's
Bluetooth signal into infrared and sends out commands to your TV, DVD or Blu-
Ray player, effectively allowing users to place it anywhere around their home
entertainment system. The remote control functions are handled by Dijit's
customized app, where you'll be able to browse, search and call up TV shows,
using the integrated guide. The app, like its iOS counterpart, is available
for free, but the system itself will set you back about $70. If you're even
remotely interested, check out the source links below, or the full PR after
the break.
Continue reading _Griffin's Beacon universal remote control system now
available for Android, ships for $70_
Griffin's Beacon universal remote control system now available for Android,
ships for $70 originally ...
Satechi Bluetooth Hands-free Car Stereo Fm Transmitter for iPhone 3Gs & 3G and Bluetooth Stereo A2DP
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