Speaker Sound Q Calculator

Directory index is measured in decibels and it is used to measure the directional characteristic of a sound source. It is also expressed as a dimensionless value of Q. It refers to the front-to-back ratio or best ratio of front-facing signals in relation to the sound waves. Use our online speaker sound Q calculator to calculate the directivity index and the theoretical Q of a loud speaker.


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Directivity Index is a significant aspect to be considered with respect to the sound source, especially in the reverberant field. The online speaker sound Q calculator uses the inputs horizontal overage and vertical coverage to calculate the theoretical loudspeaker value and directivity index.