How is the direction/dispersion pattern of a speaker typically measured?

The correct method to measure the direction or dispersion pattern of a speaker is by degrees at the -6dB down points. This technique is standard in audio engineering, as it quantifies how the sound energy radiates from a speaker and drops off in intensity.

In this context, the -6dB point is significant because it indicates a reduction in sound intensity that corresponds to a halving of the sound pressure level. By utilizing this specific measurement, audio professionals can determine the effective dispersion of sound in terms of angle, which is crucial when setting up a sound system to ensure even coverage across a venue.

This measurement helps in understanding the speaker's performance in a particular environment, allowing for better placement and configuration to achieve optimal sound quality. The angles at which the sound level reaches the -6dB mark define the dispersion characteristics of the speaker, indicating how wide or narrow the coverage will be.

While frequency range and decibels provide important information about a speaker's performance, they do not directly define its directional characteristics as effectively as the degree measurements at the -6dB points do. Listening distance could give insights into coverage but does not quantify the directivity of the speaker.