Why buzzer has noise

A buzzer, also known as a beeper, is a device that produces a loud, buzzing sound. It is used in a variety of applications, such as alarms, timers, communication devices, automotive industry, and medical equipment. The purpose of a buzzer is to grab the attention of the user or to alert the user about an event or occurrence.

History of Buzzers

Buzzers have been around for a long time, with the earliest buzzers dating back to the late 19th century. Initially, buzzers were large and bulky, making them difficult to use in portable devices. Over time, buzzers have become smaller and more reliable, allowing them to be used in a wider range of applications.

How Buzzers Work

The anatomy of a buzzer consists of a metal diaphragm, a coil, and a magnet. When an electrical current is passed through the coil, it creates a magnetic field that vibrates the diaphragm, producing the buzzing sound. There are several types of buzzers, including piezoelectric buzzers, magnetic buzzers, and mechanical buzzers. Each type works slightly differently, but the basic principle remains the same.

Advantages of Buzzers

Buzzers are widely used because of their reliability, durability, and cost-effectiveness. They are easy to use and can be found in a variety of applications, from alarms and timers to communication devices and medical equipment. Additionally, buzzers are known for their long lifespan, making them a cost-effective solution for many applications.

Different Applications of Buzzers

Buzzers are used in a variety of applications, including alarms and timers, communication devices, the automotive industry, and medical equipment. In alarms and timers, buzzers are used to alert the user when the set time has elapsed. In communication devices, buzzers are used to indicate incoming calls or messages. In the automotive industry, buzzers are used as reverse alarms or as indicators for seatbelt warnings. In medical equipment, buzzers are used as alarms to alert medical personnel in emergency situations.

Advancements in Buzzer Technology

In recent years, advancements in buzzer technology have led to the development of smart buzzers. These buzzers can be programmed to produce different sounds, making them useful in a wider range of applications. Additionally, miniaturization of buzzers has allowed them to be used in smaller and more compact devices.

Choosing the Right Buzzer

When choosing a buzzer, it is important to consider several factors, including the application, the operating environment, and the required sound output. There are several types of buzzers available, including piezoelectric buzzers, magnetic buzzers, and mechanical buzzers. Each type has its own unique features and benefits, so it's important to choose the right one for your specific application.

Some tips for selecting the right buzzer include considering the operating voltage, current consumption, and sound output. It's also important to consider the size and shape of the buzzer, as well as its environmental resistance, such as its resistance to temperature, humidity, and vibration.

Conclusion

In conclusion, buzzers have a long history and are widely used in a variety of applications due to their reliability, durability, and cost-effectiveness. From alarms and timers to communication devices and medical equipment, buzzers play an important role in alerting users and grabbing their attention. Advancements in buzzer technology have led to the development of smart buzzers and miniaturized buzzers, making them even more versatile and useful. When choosing a buzzer, it's important to consider the application, operating environment, and required sound output, and to select the right type of buzzer for your specific needs.

When the sound of the buzzer is not a crisp and simple hum, we will call it a murmur or a broken sound. The cause of the buzzer noise can be divided into two possibilities.

First, there are problems with the way of using:

The voltage to the buzzer is too high: the diaphragm hits other parts inside the buzzer, the part hits and makes a sound

The frequency used is incorrect: the frequency is not set at the rated frequency. For example, the resonant frequency of the product is 2048 Hz, but the user gives 2400 Hz or 2700 Hz. The buzzer is easy to produce abnormal sound.

Second, the buzzer quality is poor:

Diaphragm eccentricity: The diaphragm of the electromagnetic buzzer is “putting” rather than sticking to the bracket, so the diaphragm may run out of the position due to the intense external force, which cause noise.

Intrusion of foreign matter: When assembling the buzzer or when the production line is processed, there is iron powder, and iron filings enter the inside of the buzzer, which may also cause noise.