A Glance At Some Of The Trendiest Wireless Audio Gadgets
Recently a large number of wireless audio devices have appeared such as latest-generation wireless headphones, iPods, cell phones and wireless amplifier devices that claim to cut the cord. We will take a look at some of the latest products to find out which applications they work for.
Products can be categorized into devices with built-in and those with optional wireless functionality. Streaming audio products will frequently have a plug-in slot for adding a wireless LAN card. Latest touch-screen iPods and iPhones already have WiFi and Bluetooth built in.
The Bluetooth protocol is a relatively low-cost solution. Still, its drawbacks have an influence on high-quality audio applications and are often ignored.
1) Inadequate operating range
Bluetooth usually only offers a 30 foot range. This is sufficient for single-room applications. However, this limiting factor does not permit multi-room streaming utilizing Bluetooth.
2) Audio compression because of restricted data rate
Bluetooth will use audio compression since it does not reliably offer a high-enough data rate for uncompressed audio. The audio will be degraded to some extent because of the audio compression. For this reason higher-end audio equipment normally does not use Bluetooth wireless audio.
3) Audio delay
As a result of audio compression, Bluetooth will cause a signal delay of not less than 10 ms which will cause the audio to be somewhat out of sync in case of video and real-time applications. This is yet again less of a dilemma for MP3 players.
4) No support of multiple headphones
Bluetooth is fairly limited in regard to supporting streaming to multiple headphones. Streaming to several headphones is practical for numerous people wanting to listen to the same transmitter. This is less of a problem for MP3 player applications.
WiFi is an additional commonly used wireless protocol that is also suitable for audio streaming. WiFi does support uncompressed audio but will have problems broadcasting to a high number of wireless receivers simultaneously. Due to the relatively high power consumption it is hardly ever utilized in wireless headphones however. WiFi is suitable for streaming audio from a PC however since nearly all PCs have WiFi access.
Home wireless speaker devices and wireless amplifiers generally utilize proprietary protocols. These protocols are specifically designed for real-time audio applications. Yet, entry-level wireless speakers and headphones still use FM transmission. FM transmission suffers from rather high audio degradation and noise / static.
More recent wireless audio protocols are based on digital transmission. This prevents audio degradation. A number of protocols also incorporate error correction to cope with interference from other wireless products.
Newest-generation wireless amplifiers permit streaming to an infinite number of receivers and support uncompressed audio transmission.
Some of these protocols support low-latency audio transmission which ensures that the audio of all speakers will be in sync in a multi-channel application. These wireless audio transmitters typically work at 2.4 GHz. There are also some products including Amphony’s line of wireless audio devices that operate at 5.8 GHz. Products that work at 5.8 GHz have less competition from other wireless products than those using the crowded 2.4 GHz frequency band.
Wireless amplifiers offer different levels of audio quality, output power and standby power. Digital Class-D amplifiers offer high power efficiency of at least 80%. They also have low standby power, typically less than 5 Watts. This minimizes heat and keeps them cool during operation. Some digital amplifiers, though, have relatively high harmonic distortion. Picking a low-distortion amplifier is essential. Good-quality wireless amplifiers have audio distortion of less than 0.05%.
Dodge 6.7 towing 43 foot toy hauler
|
|
Black Contact Paper, 18 x 75′ $23.05 Adds decorative accents to any horizontal or vertical surface. Each roll features an easy-to-peel liner and an adhesive that allows it to be repositioned during installation without leaving a sticky residue. Itâs easy to apply, easy to remove, and easy to keep clean. Simply cut to length and shape for a custom application…. |
|
|
Nostalgia Circus-Cart Popcorn Makers At just under 5 feet, this tall, circus-style popcorn cart will be the hit of every party. This full-sized cart pops up to 1.5 gallons of movie-house quality popcorn per batch. Despite its old-fashioned, street-corner look, the Circus Cart Popcorn Maker is designed for use in your home so you can prepare hot, fresh popcorn anytime. It features a large, stainless steel kettle with a built in sti… |
|
|
LEGO Kids’ 9002953 Star Wars Darth Maul Watch $17.99 Perfect for young or old Star Wars fans, the LEGO Kids’ Star Wars Darth Maul Watch features a fun, colorful dial with a cartoon image of Darth Maul and his interconnected lightsabers. The white hour and minute hands and Arabic numeral hour indexes make it fun to tell time. You can customize the watchband with interchangeable links or change out the red bezel for the black one. Plus, the watch come… |
|
|
Vg6 Toys Beneath Our Feet … |
|
|
Toys Beneath Our Feet: Inline Skating (VideoGroove 6) $45.00 VideoGroove, the best resource for everything you’re looking for in a skate video. Here is a quick run down of the video: Australia’s Nationals Comp and Big Day Out, The Sunshine Tour, Mini Views on Tim Ward, Dustin Latimer, Josh Clarke, Kevin Gillan and Nick Riggle and all of the footage was acquired from deep in the streets as captured by the ever growing army of VG cameraskaters. You will not b… |
|
|
Omega Paw Paw-Cleaning Litter Mat, Tan $5.66 The Paw Cleaner Omega Paw Paw Cleaning Litter Mat û Taupe can help to clean litter from your petÆs paws. This innovative mat features angled louvers across that mat that can not only trap the litter but can also hide it from view. You can simple place it in any part of your house to reduce amount of litter tracking on floors and carpets. Omega Paw Paw Cleaning Litter Mat – Taupe Angled louvers … |
|
|
Baby Shower Cupcake Kit by Crispie Sweets – Sprinkles and Baking Cups Set $14.99 These adorable Cupcake Kits are pre-matched for you with deliciously sweet sprinkles that are perfectly coordinated to match the charming baking cups. Each Cupcake Kit contains 60 baking cups, and three 2 ounce jars of sprinkles (by volume, not by weight), and a BONUS card that contains 10 Tips for Baking Perfect Cupcakes. These kits make a spectacular gift! Available in over 30 varieties!… |
|
|
Baby Diaper Pin Cupcake Toppers – 24 Picks – Eligible for Amazon Prime! $11.99 Put these cupcake rings on your treats and they’ll be a sure crowd pleaser! These can also be used for many other purposes such as party favors, gift decorations, etc. For Decoration only. Warning- may not be suitable for young children. Adult supervision required…. |
|
|
Xbox 360 Wireless Controller – Glossy Black $32.99 Integrated 2.4GHz high-performance wireless technology with 30′ rangeImproved ergonomic design gives you maximum fortPlug the Xbox 360 headset into the controller for full duplex voice municationAdjustable vibration feedback for longer battery life… |
|
|
Call of Duty 4 : Modern Warfare $13.80 The Call of Duty 4: Modern Warfare Game of the Year Edition delivers the most thrilling combat action experience available. Take on the world as both a U.S. Marine and a British S.A.S. Soldier. Travel across the globe, relying on your wits and weapons to launch all-out assaults and accomplish stealth missions. It’s the most up-to-date collection of firepower, machinery and military vehicles in the… |