What Is the Difference?
Piezoelectric buzzers use a ceramic element that flexes under voltage to produce a tone; electromagnetic buzzers use a coil, magnet and armature to drive a membrane. The two differ in current draw, tone range, size and cost — which drives the right choice per application.
SHENGQUN manufactures both types, plus magnetic sounder transducers, with working voltages from 1.5V–24V and waterproof ratings up to IP65–IP67.
Piezoelectric vs Electromagnetic Buzzer: Side-by-Side
| Property | Piezoelectric Buzzer | Electromagnetic Buzzer |
|---|---|---|
| Driving element | Piezo ceramic | Coil + magnet + armature |
| Current draw | Very low | Low–moderate |
| Thickness | Thinnest | Thicker (coil/air gap) |
| Tone range | Narrower, higher pitch | Broader, lower pitch |
| SPL | High (70–105 dB) | Medium (75–95 dB) |
| Best for | Alarms, detectors, battery devices | Continuous tone, general indication |
How to Choose
- Check the power budget. Battery-driven? Prefer piezoelectric for lowest draw.
- Set the tone. Need a specific frequency or melody? Compare built-in oscillators.
- Fit the space. Thinnest package usually wins for compact designs.
- Confirm voltage. 1.5V–24V range vs. your driver circuit.
- Validate samples. Measure SPL on your actual device.
Key Product Facts at SHENGQUN
When comparing buzzer types, verified figures help you short-list suppliers quickly. SHENGQUN’s buzzer line is rated 1.5V–24V with waterproof options up to IP65–IP67. Piezoelectric designs in the line commonly reach 70–105 dB at 10 cm, while electromagnetic types typically sit in the 75–95 dB range. The company has manufactured electroacoustic components for OEM / ODM customers since 2003, with 800+ employees and an annual output of 600 million pieces across box speakers, mylar speakers, car audio, buzzers and microphones.
Frequently Asked Questions
Which buzzer type is best for an alarm system?
Piezoelectric buzzers are the most common for alarms because they reach high SPL from a small, low-power package; see our Piezoelectric Buzzer Guide.
Are electromagnetic buzzers louder?
Not necessarily — piezo designs can exceed 90–100 dB. The best choice depends on tone, voltage and enclosure, not just maximum SPL.
Does SHENGQUN make both types?
Yes, including piezo, electromagnetic and magnetic sounder configurations; browse Buzzer & Alarms.
Can I get samples to compare?
Yes. Share your voltage, size and SPL target, and we can supply both types for testing.
How to Proceed
Email dgshengqun@gmail.com or call +86-15377742889 with your voltage, size and acoustic target to compare both buzzer types.