Piezoelectric horn application trend 

As a new piezoelectric ceramic speaker electroacoustic device, its development has experienced the process of history, but because of its excellent high frequency sound, shape structure of the thinner, and lower power consumption, have been on a hand-held electronic consumer goods. Now as a rare earth moving-coil speaker of raw materials, and comprehensive control policy prices because the country's resources, and armed with the requirement of consumer electronic products increasingly thin body, the demand of the piezoelectric ceramic speaker will be more and more common, widely used in electronics, smart phones, OLED wearable electronics, ultra-thin computer, bathroom mirror, ultra-thin TV, etc., this product is currently only three can be mass production, including a domestic customers we supply conductive silver glue in low temperature, customers need to please contact 13922125860. But given the unique vocal characteristics of the piezoelectric loudspeaker, some friends may not fully understand its working principle, and cause the cognitive bias, and the errors in the design. Here, the author will show the charm of the piezoelectric ceramic horn step by step. 

The structure of the piezoelectric ceramic horn is in a very thin layers (typically five to six layer) are attached to the thin pieces of metal on piezoelectric ceramic piece, their combination is the diaphragm. When piezoelectric stretching vibration membrane bending upwards; When piezoelectric contraction, diaphragm downward bending. To the diaphragm, alternating voltage then it will be as the change of voltage and bend pushing air voice up and down.  

So, let's horn of the fourth generation of piezoelectric ceramics and make a comparison between traditional loudspeaker, you will find that there are a lot of differences. 

The fourth generation of piezoelectric ceramic speaker compared with the advantages of traditional moving-coil speaker. 

The application object graph: 

In addition to the above list is different, the piezoelectric ceramic loudspeakers and other characteristics, such as: 

1. The thin, light weight, small footprint. 

2. High energy conversion efficiency, low power consumption. 

3. No electromagnetic leakage and interference, no antimagnetic design. 

4. No mechanical contact, no noise, simple structure, can be driven directly by the IC. 

5. Wide frequency response range, clear natural sound quality. 

In the beginning of design decision when choosing piezoelectric horn, design and installation will also be critical, the explanations below: 

The speaker recommended installation room height reference data 

The speaker installation considerations: 

1. The speaker directly through the aprons on the cavity before the panel installation. 

2. The speaker mounting surface (positive) corresponding to the speaker of the reserved to level off, such as using convex platform or heavy platform reserved installation dimensions are consistent with the speaker positive frame size. 

3. The speaker by closely the adhesive on the chassis of aprons, isolate cavity closed before and after, such as cavity before and after any wind gap, will seriously affect the volume and sound quality. 

4. The PCB and other components must be installed in the machine and firm, not have loose phenomenon. In order to avoid from the loudspeaker sound resonate and noise at work, affect the whole machine quality. 

5. The structure design, should as far as possible to ensure spoke after the airtight, otherwise it may seriously affect the volume, timbre, avoid all kinds of possible leakage hole (leak hole is mainly by the SIM card, battery cover, mobile phones such as external socket cannot seal position of sound leakage of equivalent) close to the speaker, so as not to cause the sound leakage, make sound become smaller, or leak hole away from the speaker by mobile phone design. 

6. The speaker on the back of the cavity cover from the right after the cabinet or on the PCB or PCB components or any other component should be > 0.1 mm (reference piezoelectric speaker recommended installation room height reference data), avoid working with speaker chassis components on the PCB or PCB or other any of the components of touch, friction and so on, otherwise you will produce noise, seriously affect the loudspeaker replay sound quality. 

It is worth noting that due to the piezoelectric horn is a capacitive load, is the need for large voltage audio driver, that is to say, you to choose ceramic speaker, please don't forget to make some small changes in the electricity on the road, with our recommended by verified drivers, the following countries half NS488580, for example, look at the circuit design of reference: