The sound quality of the megaphone depends on which aspect

 Handheld megaphone use is widely used in tour guides, military and police riot, flood fighting, film shooting, military training and other on-site command.

 Where the speaker speakers are good, the objective test indicators of our commonly used and common electric speakers depend mainly on their structure and geometry. The sound quality depends on the speaker diaphragm material, the type of diaphragm material and its physical properties.

 In China, the state stipulates that the octave in the region with the highest sensitivity on the frequency response curve or the average sound pressure level in the wider range specified by the manufacturer drops by 10db, drawing a straight line parallel to the abscissa, and its frequency The two frequencies corresponding to the focal points at both ends of the box curve are the upper and lower limits. The wider the effective band, the smaller the unevenness and the better the performance of the speaker.