Horn Frequency Response

When an audio signal with the same voltage but different frequencies is applied to a speaker, the sound pressure generated will change. Generally, the sound pressure generated during mid audio is higher, while the sound pressure generated during low and high audio is lower. The frequency response characteristics of the speaker refer to the range of high and low frequencies when the sound pressure drops to a certain value in the mid range audio.
The ideal speaker frequency characteristic should be 20~20000Hz, so that all audio can be evenly replayed, but this is not possible. Each speaker can only replay a certain part of the audio well.