Posted on 08-08-2010 by microbuzzer
Recently, a client mentioned on the buzzer, speaker of the PA cavity why the overall impact of such a big sound reasons, as follows:
We know that buzzer, speaker of the PA cavity design, is often understood as follows:
1: to have sound chamber, from the PA with, as to why should tone chamber, not sure.
2: Sealing [...]
Tags: Buzzer, sound chamber, speaker
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Posted on 08-08-2010 by microbuzzer
When welding buzzer should note the following:
A, lead-free :280-290 degrees;
B, a lead :330-350 degrees;
Substrate (copper / iron / steel) General welding time: 3S
Silver surface of general welding time: 1.5S
Tags: Buzzer, Electric soldering iron
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Posted on 08-08-2010 by microbuzzer
8 ohm speaker impedance frequency
8 ohm speaker arising from the resonance in the 400Hz, its resistance increased from 8 ohms to 10 ohms, at 10KHz, its resistance began to increase, to 1MHz, 100 ohms. In the absence of the audio signal, the final output is a symmetrical square wave, although speaker impedance of 100 ohms, [...]
Tags: 8 ohm, frequency, speaker
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Posted on 08-08-2010 by microbuzzer
Buzzer Category:
1, according to the principle of sub-drive mode can be divided into: active buzzer (includes driver circuits) and passive buzzer (external drive);
Tags: Buzzer, Buzzer classification
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Posted on 08-08-2010 by microbuzzer
Buzzer resonant frequency of the piezoelectric actuator
Piezoelectric buzzer as the audio signal generator has a wide range of applications, because they are low power, voice clear and penetrating. Buzzer drive circuit or from an external drive circuit requirements oscillations in the resonant frequency of the piezoelectric element. Piezoelectric elements in its resonance frequency to provide [...]
Tags: Buzzer, Piezoelectric, resonant frequency
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Posted on 08-08-2010 by microbuzzer
Triode transistor in buzzer role is the role of the voice signal amplification. Triode is a control component, mainly used to control the current size to a total emitter Connection Example (signal from the base input, the output from the collector , emitter grounded), when the base voltage UB has a small change, base current [...]
Tags: Buzzer, Transistor's role
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Posted on 08-08-2010 by microbuzzer
The definition of the decibel value of the buzzer
DB (decibel) is mainly used for measuring short dB decibel sounds, commonly used dB that is the sound pressure level of the size of the unit.
sound pressure per doubling of sound pressure increase of 6 dB magnitude. “Sub” means one-tenth digit is a “shell”, but generally only [...]
Tags: Buzzer, decibel
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Posted on 08-08-2010 by microbuzzer
Piezo buzzer mainly by multi-harmonic oscillator, piezoelectric buzzer, impedance matching device and the resonance box, shell and other components. Some piezoelectric buzzer case also equipped with light emitting diodes.
Tags: Magnetic Buzzer, Piezo Buzzer, structural principle
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Posted on 07-08-2010 by microbuzzer
Magnetic buzzer easy way to active and passive
First, visual: the former is very similar form as the county upwards of two buzzer pin placement, you can see the green circuit board is a passive buzzer, no circuit boards with vinyl A buzzer is active closed. However, this is only the preliminary judging criteria, but not [...]
Tags: active electromagnetic buzzer, Buzzer, passive electromagnetic buzzer
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Posted on 07-08-2010 by microbuzzer
Fault Analysis of Electromagnetic buzzer
1, no do not ring before installation. – This is a quality in itself is a buzzer not work (the first one kind of buzzer such cases the probability of occurrence of more);
2, after welding when no sound or sound without sound. – This situation could be used in iron welding [...]
Tags: Buzzer, Electromagnetic buzzer, Fault
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