If you are planning to get a pair of wireless speakers for the forthcoming New Year 2021 party, then it is time to pay attention to some exclusive details. Among all, a harmonic filter is an important factor. Once you can clarify this particular term, making a generous selection will become easy.
What is Total Harmonic Distortion all about?
Total harmonic distortion is the difference between the sound that is produced by the speaker and the audio signal of the speaker. It is expressed in terms of decibel and percentage. You can easily translate one convention to another. Higher the percentage, a higher amount of energy gets radiated by the speaker.
Wireless speakers are available in variable shapes and sizes. To decide on the best model, it will be good to shed light on the overall technical performance. The harmonic distortion will help you to decide if the model selected will be the right choice for you or not. Additional terms that must be highly focused include output power and frequency.
What Contributes to Harmonic Distortion of Speaker?
Several components contribute to the harmonic distortion of wireless speakers. Among all, the in-built power amplifier is a vital one. Higher the amplifier, higher will be the level of distortion. You may take help of a harmonic filter for determining the total level of harmonic distortion.
Some manufacturers list the level of distortion, while some do not. Usually, harmonic distortion is simply made by feeding a tone for testing the speaker. The tone serves as a sinusoidal wave having minimum distortion. Depending on signal frequency, it has become easy to measure harmonic distortion.
Most of the amplifiers will display variable distortion with variable frequency. In general, amplifiers belonging to the class-D family will have high distortion at frequencies having a minimum measurement of 5 kHz.
What are Some Additional Causes of Distortion in Speakers?
Sometimes, harmonic distortion is the outcome of the driver of the loudspeaker itself. Maximum speakers make use of drivers that are inclusive of voice coils. These coils are placed in magnetic fields that get excited by an audio signal. In this case, some reasons that lead to high rate-distortion include the following:
- Change in magnetic flux
- Type of suspension of the diaphragm
- Amount of power with which the speaker is driven
The material used for building the enclosure of your speaker will be responsible for vibration. Additional sound distortion may be the result of:
- The pressure level of sound
- The shape of the box
- Material enclosed
- Audio frequency
How can You Determine Total Distortion through Measurement?
With the right type of measurement, it will become easy to determine total harmonic distortion. A signal generator is employed for providing a linear sine tone. The sound is finally picked up by a microphone. Finally, the signal is analysed with the help of audio analysers.
The method of carrying out inter-modulation distortion dialysis will give you another picture about the overall distortion. Keeping these points in high consideration will help in making a generous selection of wireless speakers for your home.