What Are Buzzers and Their Different Types?

Buzzers play a crucial role in diverse electronic gadgets, functioning as signal emitters or warning systems through the generation of audible tones or vibrations. In addition to being modest in size, these indispensable components are available in various types, each distinguished by its distinct operating principle and usage. In this blog, we will delve into the diverse classifications of buzzers, specifically piezoelectric, magnetic, electromagnetic, mechanical, and electromechanical variants.

Piezoelectric Buzzers
 
Piezoelectric buzzers rank as one of the most frequently employed types, primarily a result of their straightforward operation and dependable performance. These buzzers function based on the piezoelectric effect, where the application of an electrical voltage to a piezoelectric crystal results in the production of sound. This process involves the crystal undergoing deformation, which generates sound waves. Noteworthy characteristics of piezoelectric buzzers include their compact dimensions, minimal power consumption, and robustness. Generally, they are found in electronic devices such as timepieces, calculators, and compact appliances.
 
Magnetic Buzzers
Magnetic buzzers, sometimes referred to as magnetic transducers, operate through the utilization of a wire coil and a diaphragm. When an electric current courses through the coil, it generates a magnetic field that exerts both attractive and repulsive forces on the diaphragm, prompting it to oscillate and generate sound. Magnetic buzzers find frequent application in situations necessitating a persistent, high-frequency sound output, such as in smoke alarms, timers, and automotive warning systems.
 
Electromagnetic Buzzers
 
Electromagnetic buzzers share similarities with magnetic buzzers, though they differ by operating at a lower frequency and emitting a distinct sound profile. Their components typically include a coil, an armature, and a contact. When an electric current courses through the coil, it produces a magnetic field that exerts an attractive force on the armature, drawing it toward the coil. This motion, in turn, prompts the contact to meet with a surface, resulting in the generation of a buzzing or clicking sound. Electromagnetic buzzers are frequently found in applications such as doorbells, gaming consoles, and various household appliances.
 
Mechanical Buzzers
 
Mechanical buzzers represent the most rudimentary form of buzzer, their operation hinging on basic mechanical constituents like a spring and a striker. They operate when an external force, like pushing a button or triggering a lever, releases the spring, propelling the striker to make contact with a resonant surface. This collision produces a buzzing or clicking auditory output. Mechanical buzzers are typically encountered in legacy devices, including rotary telephones and mechanical timers.
 
Electromechanical Buzzers
 
Electromechanical buzzers amalgamate the operating principles of both electromagnetic and mechanical buzzers. They also incorporate components such as a coil, an armature, and a striker, akin to electromagnetic buzzers. In addition to these elements, they integrate a resonating component like a diaphragm or a gong which augments the generated sound. The flow of electrical current through the coil initiates the movement of the armature, resulting in an impact on the resonating element, thereby generating a unique auditory output. Electromechanical buzzers find application across diverse scenarios, including industrial machinery and emergency notification systems.
 
Conclusion
 
Each type of buzzer has its advantages and disadvantages, making them suitable for specific applications. Understanding the different types of buzzers, including piezoelectric, magnetic, electromagnetic, mechanical, and electromechanical buzzers, allows engineers and designers to choose the most suitable buzzer for their specific applications. When it comes time to begin sourcing your desired buzzers and their related aircraft components, we have you covered here on ASAP Parts Unlimited. Every item listed on our website is available for purchase at any time, and you may always use our online RFQ service and forms to request quotes on items of interest with ease. Get started today and see why so many customers steadily choose complete sourcing solutions for part fulfillment.