Piecewise linear vibration response of an electromagnetic horn and its acoustic characteristics

The piecewise linear vibration model of an electromagnetic horn including a movable iron core and a diaphragm with time-varring electromagnetic force excitation was built. Then, the vibration responses of the horn were obtained by using numerical integral method. According to the calculated steady vibration displacement amplitude and frequency, the acoustic characteristics of the electromagnetic horn were analyzed with the simulation software. Finally, the effects of initial pressure of contact points and gap parameters on the vibration displacement amplitude, frequencies and sound pressure level were also investigated comprehensively. The conclusions drawn were valuable for optimal design of electroacoustic devices, such as, electromagnetic horns.