Skip to main content

Just How Do Producers Of Wireless Home Speakers Boost The Noise Performance?

Just How Do Producers Of Wireless Home Speakers Boost The Noise Performance?


by Linda Cullmann


It is easy to be baffled by the terminology which wireless speaker producers employ in order to describe the performance of their products. I will explain the meaning of a regularly utilized specification: "signal-to-noise ratio" to help you make an informed choice when buying a brand new a pair of wireless loudspeakers.

As soon as you have selected a range of cordless loudspeakers, it's time to explore a few of the specifications in more detail in order to help you narrow down your search to one product. An important criterion of wireless loudspeakers is the signal-to-noise ratio. To put it simply, the signal-to-noise ratio describes how much hum or hiss the speakers will add to the music signal. This ratio is typically described in decibel or "db" for short.

You can perform a straightforward comparison of the wireless speaker noise by short circuiting the transmitter input, setting the speaker gain to maximum and listening to the speaker. You will hear some amount of hissing and/or hum coming from the loudspeaker. This hiss is produced by the cordless speaker itself. Make certain that the volume of each couple of wireless speakers is set to the same amount. Otherwise you will not be able to objectively compare the level of static between different models. The general rule is: the lower the amount of static that you hear the better the noise performance.

If you favor a pair of wireless loudspeakers with a small amount of hissing, you may look at the signal-to-noise ratio number of the data sheet. Most manufacturers will publish this figure. wireless speakers with a large signal-to-noise ratio will output a low level of noise. There are numerous reasons why wireless loudspeakers are going to add some form of hiss or other unwanted signal. Transistors and resistors which are part of each modern cordless loudspeaker by nature generate noise. The overall noise depends on how much hiss every component produces. Yet, the position of those components is also important. Components that are part of the speaker built-in amplifier input stage are going to normally contribute most of the noise.

The cordless broadcast itself also will cause hiss which is most noticable with types which utilize FM transmission at 900 MHz. The amount of static is also dependent upon the amount of wireless interference from other transmitters. Newer models are going to usually utilize digital music transmission at 2.4 GHz or 5.8 GHz. The signal-to-noise ratio of digital transmitters depends mostly on the kind of analog-to-digital converters and other components that are utilized in addition to the resolution of the wireless protocol.

A lot of modern wireless loudspeakers have built-in power amplifiers that incorporate a wattage switching stage which switches at a frequency around 500 kHz. Consequently, the output signal of wireless speaker switching amps contain a fairly large amount of switching noise. This noise component, however, is usually inaudible because it is well above 20 kHz. However, it can still contribute to speaker distortion. Signal-to-noise ratio is generally only shown within the range of 20 Hz to 20 kHz. For that reason, a lowpass filter is utilized while measuring cordless speaker amps to eliminate the switching noise.

Makers measure the signal-to-noise ratio by setting the built-in amplifier such that the full output swing may be realized and by feeding a test tone to the transmitter that is generally 60 dB underneath the full scale of the speaker amplifier. After that, the noise floor between 20 Hz and 20 kHz is measured and the ratio to the full-scale signal computed. The noise signal at other frequencies is eliminated via a bandpass filter throughout this measurement.

A different convention to express the signal-to-noise ratio uses more subjective terms. These terms are "dBA" or "A weighted". You will discover these terms in many wireless speaker spec sheets. This method tries to evaluate in how far the cordless speaker noise is perceived by human hearing which is most sensitive to signals at frequencies at 1 kHz. An A-weighted signal-to-noise ratio weighs the noise floor according to the human hearing and is generally larger than the unweighted signal-to-noise ratio.




About the Author:





You are receiving this because you signed up for it on 2013-04-23 from IP 118.69.225.119


To fine-tune your selection of which articles to receive, just login here
using your username:


To unsubscribe please use the following link:

Unsubscribe




---------------------------------
New Unique Article!

Title: Just How Do Producers Of Wireless Home Speakers Boost The Noise Performance?
Author: Linda Cullmann
Email: sales@amphony.com
Keywords: speakers,internet,computers,hardware,music,tv set,radio,technology,shopping,product reviews
Word Count: 675
Category: Computers
---------------------------------

Comments

Popular posts from this blog

Why You Should Check Out Boston Terrier Puppies Texas

By Sharon Morgan Dogs are the best friends that no human being deserves. No matter what breed it is, they are all special and unique in their own little ways. Every breed offers an adorable characteristics whether physical or not which deserves to be recognized. Just like all the others, Boston terriers also has a distinct trait that you cannot help but be amazed about making them an awesome choice of gift for your loved one that is why you should check out Boston terrier puppies Texas . You can never deny how much happiness a dog brings in a family or in a person. Dogs were even given the title of a best friend of men and no one could ever argue with that. They are not just sweet but are also simple hearted. You happy is them happy and nothing else could ever top that. Dogs bring colors to the world. No wonder why many people have made a decision to asopt one as their own. Many people do not treat dogs as just dogs. They treat them as one of their own buying them expensive f...

Discount Art Supplies St Charles Illinois How To Get Them

By Gregory Taylor Due to the current economic conditions, everyone is looking for ways to save money on purchases. If you are a professional performer or simply someone who enjoys doing sculpture in spare time, you need to know where to shop and how to pay as little as possible for all your sculpture provisions. The following article will lead us through the theme Discount art supplies St Charles Illinois how to get them. When you go to your local sculpture supply stores, you will be shocked to see that most of the things have a high price tag. Even a single paint brush can cost you as much as 15-20 dollars. However, when you move on, you will see that there are certain sculpture materials that are way too cheap. The huge difference in price is due to the quality of the products and there are certain factors that will determine the quality of materials you would want to buy. Finding sculpture materials online is also useful for beginners who might require detailed informatio...

Why You Should Use Wood Eye Pencil Liner

By Jason Olson Eye liners which are part of the makeup kit are used by different people to improve their natural beauty. The main types of eye liners are wooden and liquid ones. Although both eyeliners perfectly perform their functions, most people prefer using the wooden ones. Research shows that most people get irritations when they use the liquid eye liners. This article gives more reasons why you should use the wood eye pencil liner. The wooden eye liner does not cause any irritations. Therefore, they are safe. It is usually creamy and it is very durable hence can be used for a long time. They give a distinct look to your eyes by delivering intense colors to them. It is also very easy to use these eye liners and they do not leave smears on your eyes. All you need to do is to sharpen it so that it can get the thickness you would like to use for your eyes. It has very deep color that brings out the shape that you desire. It has a contoured smudge and they are of different ...