Extensive Applications Of Buzzer Alarms For Audible Alarming Alerts

With widespread usage, buzzer alarms are required in household appliances as well as have industrial applications too. They serve in innocuous purposes like microwave ovens, toys but are also equally important for medical equipments, fire alarms like extremely serious situations. The main challenge for an engineer to design this kind of alarms is to have satisfactory performance, sound level, frequency, current consumption, mounting configuration and other important attributes.

In the market, buzzer alarms of different types are available. The different types of buzzers available are Electrical, electromechanical, electro-magnetic, electro-acoustic, magnetic, piezoelectric buzzers, etc. The electromechanical systems were used in the early days identical to electric bell without having a metal gong. The word has come from the scratchy noise electromechanical buzzers made. The magnetic buzzers have narrow operating voltages with higher current consumption. It has lower rated frequency, smaller footprint and Lower sound pressure levels.

The piezoelectric buzzers offer no mechanical wear, no electrical noise, consume less power and have a clear penetrating sound. They use high quality of piezoelectric elements for better sound volume. The advantages of better transducer design have enabled to reduce the size of these types of buzzers which could help in serving multiple applications.

The buzzers come with two different types of packages: the ones with a driving-circuit and the ones without a driving-circuit. The audible buzzer alarms with a driving-circuit require an appropriate voltage to create the audible sound, and it provides the ease to designers for having thoroughly tested in operating temperature range and environmental conditions.

After choosing the type of sound needed for a piezoelectric buzzer like continuous, intermittent or specialty sound, the designer moves towards the sound level. The sound level between 0 dB (hearing threshold) to 130 dB (threshold of pain) is a must for audible alarming. The alarm must sound a little higher than the ambient background noise. They can be categorized on the basis of applications like: Loud/extra loud audible alarm for heavy industrial applications, medium level audible alarm for light industrial purposes and soft level audible alarm for office/elevator level purposes.

An important characteristic of the alarm is the rated frequency i.e. the number of pressure variation per second measured in hertz. The typical ranges of audible alarms are: 1-2 KHz for low frequency, 2-3.5 KHz frequency, 3.5-4.5 KHz for high frequency.

The cost-effectiveness of these kinds of buzzers has made them to proceed in upward pace in the market. While the requirement of large panel mounts for industrial units growing steadily, the smaller units are moving for greater demands.

Some of the distinctive usages of Piezoelectric Buzzers are:

• Consumer electronic appliances: Refrigerators, Microwave ovens, fans, bath heaters, etc.
• Clocks and toys: Digital clocks, watches, alarm clocks, calculators, etc.
• Office equipments: Photocopiers, personal computers, fax machines, etc.
• Automobile instruments: Speed alarms, reverse drive buzzers, seatbelt check sounders, etc.
• Safety and security purpose: Fire and burglar alarms, gas leakage alarms, etc.
• Other types: Vending machines, bicycle horns, etc.

Irving Blair is an acoustic equipment expert. He uses various acoustic products and reviews its performance. Recently he reviewed piezoelectric buzzer and recommend this buzzer alarm for various industrial usages.

Glorious Components is a manufacturing unit of industrial acoustic components in Mainland China. We produce wide range of acoustic products for various industrial applications. Our engineers and workmen are highly experienced and have detailed knowle