Do Digital Weatherproof Speakers Have A Reduced Sound Distortion As Compared With Analog Speakers?

In this article, I am going to explain the specification “total harmonic distortion”, often also named “THD” which is often used to describe the quality of cordless speakers. It is often tough to choose a suitable set of wireless outdoor speakers manufactured by Amphony due to the huge amount of products. Aside from looks, you will often be confronted with having to study a few of the technical specifications. THD is typically not as easily understood as a few other commonly used terms such as “signal-to-noise ratio” or “frequency response”. In a nutshell, THD shows the difference between the audio that is produced by the loudspeaker versus the audio signal with which the loudspeaker is driven. The most widespread methods to express distortion are percent and decibel. These 2 conventions can be translated into one another. The percentage given as THD shows which amount of energy which is radiated by the speaker are higher harmonics versus the original signal. 10% would mean that one tenth is distortion. 1% would mean one hundredth et cetera. 10% is equal to -20 dB as 1% is equal to -40 dB.

Harmonic distortion in a cordless loudspeaker is really the result of several elements, including the power amp that is built into the loudspeaker in order to drive the loudspeaker element. Amplifier distortion usually is dependent on the amp output power and is now and then shown for several power levels.

Having amp distortion specs for several output power levels offers a better indication of the amplifier distortion performance.Generally distortion is measured with a 1 kHz test tone. Distortion, though, is usually dependent on the signal frequency. Many amplifiers will show rising distortion with rising frequency. Specifically digital class-D amplifiers will have rather large distortion at frequencies higher than 5 kHz. The next contributing factor is the speaker element itself. Most loudspeakers utilize a diaphragm kind driver which is driven by a coil that is suspended in a magnetic field. The coil is going to track the magnetic field that is controlled by the music signal in order to move the diaphragm. However, this movement is not completely linear. As such the result is distortion caused by the loudspeaker element. A lot of vendors will show harmonic distortion based on the power level as typically the higher the loudspeaker is driven the bigger the amount of distortion.

The overall distortion of the loudspeaker thus is the total of the amp distortion in addition to the speaker element distortion. Furthermore, there are different contributing factors. The loudspeaker enclose will vibrate to some extent and consequently contribute to the distortion. Total distortion is best determined via measurement. A signal generator is utilized that offers a highly linear sine tone to the loudspeaker. The sound is picked up by a measurement microphone. The microphone signal is then analyzed by an audio analyzer. The audio analyzer is going to compute the amount of higher harmonics or distortion. Intermodulation distortion analysis is an additional technique that gives a better picture of the loudspeaker distortion performance with real-world signals by using a test signal with two harmonics and measuring how many harmonics at different frequencies are produced by the loudspeaker.

Wireless speakers are going to also have some amount of distortion during the audio transmission. The level of distortion is going to depend on the sort of wireless transmission method and the quality of components. Usually 900 MHz FM transmitters have among the highest amount of distortion. Improved types are going to utilize digital transmission and transmit at 2.4 GHz or 5.8 GHz to minimize audio distortion.

Benefits Of High-Efficiency Wireless Speakers

When you are about to get yourself brand new cordless speakers, you most likely are concerned about how efficiently your wireless loudspeakers operate. I’m going to make clear exactly what the expression “power efficiency” stands for and also why you must take a closer look at this number throughout your selection of new wireless loudspeakers.

The less efficient your cordless speakers are, the more energy is going to be squandered which leads to many complications: Wireless speakers with lower power efficiency are going to squander some power. It’s best to make note of the added power expense while choosing between a high- and low-efficiency type. The wasted energy is dissipated by the cordless loudspeakers as heat. Heat does not radiate well through tiny surfaces. For this reason low-efficiency cordless loudspeakers require to use heat sinks. Heat sinks and fans demand room and are expensive. The cordless speakers therefore will turn out to be pretty big and pricey. Additionally heat fans will generate operating noise. Cordless speakers that have low efficiency can not be placed in small spaces or inside sealed enclosures since they demand a good amount of circulation.

Because low-efficiency wireless loudspeakers are going to produce merely a small fraction of the power consumed by the amplifier as useful audio energy, the amplifier requires a larger power supply than high-efficiency models causing higher cost. Additionally, due to the large amount of heat, there is going to be significantly greater thermal stress on the electric components and also interior materials that might result in dependability issues. In contrast, high-efficiency cordless speakers can be produced small and lightweight. The efficiency is displayed as a percentage in the wireless loudspeakers data sheet. Various amp architectures offer different power efficiencies. Class-A amps are usually the least efficient and Class-D the most efficient. Standard power efficiencies range between 25% to 98%. From the efficiency percentage it is possible to work out how much energy the amplifier is going to squander. An amp having a 50% efficiency is going to squander 50 % of the used energy. An amplifier that has 90% efficiency is going to waste 10%.

Please be aware, however, that efficiency depends upon just how much energy the amplifier delivers at a given moment. Each audio amplifier is going to consume a specific level of energy irrespective of whether or not it supplies any power to the speaker. Because of this the lower the energy the amplifier delivers, the lower the power efficiency. For that reason audio manufacturers normally specify the efficiency for the highest audio power that the amp can provide.

The measurement setup of amp power efficiency utilizes a power resistor which is attached to the amp. The amplifier itself is being fed a constant-envelope sine-wave signal. After that the power used by the resistor is measured and divided by the power the amp consumes. Normally a full power profile is plotted in order to display the dependence of the efficiency on the output power. Due to this the output power is swept through several values. The efficiency at every value is tested and a efficiency plot generated. When choosing a couple of wireless loudspeakers you need to weigh efficiency versus fidelity since cordless speakers which employ low-efficiency analog amps often offer the highest music fidelity whilst digital models are going to have greater distortion. A few newer cordless loudspeakers, like products that include Class-T amps, can lessen music distortion to amounts near to those of products utilizing analog music amplifiers and also are able to achieve high signal-to-noise ratio. Picking one of these outdoor wireless speakers will offer great efficiency and at the same time high music fidelity.