With the widespread adoption of vibration speakers in the mobile phone industry, their application has become very extensive. However, whether among speaker manufacturers in Dongguan, mobile phone producers, or design companies, a significant portion believe that simply replacing conventional speakers with vibration speakers suffices. This is actually a misconception. We understand that vibration speakers inherently possess both vibration effects and speaker functionality. To achieve excellent performance simultaneously in both aspects, several key factors must be addressed.


The design of the speaker itself is crucial. A vibration speaker has two resonant frequencies: one for vibration and another inherent resonant frequency for audio playback.

It is preferable for these two frequency points to be as far apart as possible. Generally, the vibration frequency should be designed between 50–200 Hz, while the inherent audio frequency should range from 600–1200 Hz. This separation ensures that when the speaker operates with corresponding frequency signals, the two functions do not interfere with each other. Manufacturers in Dongguan have observed that if the frequency points are too close, for instance, a vibration frequency at 400 Hz and an audio frequency at 800 Hz, operational noise may occur during use.


A rational speaker design requires that when an incoming call signal arrives, the frequency signal fed to the speaker must match its vibration frequency. For example, if a vibration speaker's vibration point is 80 Hz, the signal fed should be between 80–100 Hz; all other frequency signals should be attenuated. This setup sufficiently drives the phone casing to produce strong vibrations, effectively replacing the vibration motor. Given that the typical frequency of vibration motors in mobile phones is below 80 Hz, to replace the motor, the vibration frequency of the speaker must be designed below 100 Hz.


The above observations are based on my personal experience over the past year and represent my individual viewpoint. I will provide updates should new findings emerge during future work. I welcome discussions with friends across the industry.