Piezo plates may look simple, but their terminal design, feedback position, and overall structure can affect how they are driven and where they are used. This article introduces common piezo plate types and the double-sided structure often used in high-SPL applications.

Why do ambulance sirens sometimes sound slow, sometimes urgent, sometimes high-pitched, and sometimes low-pitched? These sound designs are closely related to human hearing, vehicle sound insulation, background noise, and sound directivity. This article gives you a quick overview of common siren patterns such as Wail, Yelp, and Hi-Lo, and explains the key considerations behind siren frequency design.

Buzzers are simple yet essential sound-generating components used in many electronic products. This article introduces the basic working principles of piezoelectric and electromagnetic buzzers, including self-drive buzzers, external-drive buzzers, driving signals, polarity, and key design points that affect their sound performance.

Increasing a speaker’s input power does more than simply make it louder—it may also change its overall frequency response. Explore how voice-coil heating and resistance variations affect the system Q and low-frequency performance through simulated response curves.

What does a loudspeaker specification such as 500 Hz to 20 kHz at ±3 dB actually mean? This article explains reference SPL, response flatness, and IEC −10 dB bandwidth criteria to help engineers interpret frequency response specifications accurately and avoid common comparison errors.