For a self- drive buzzer ( DC/ circuit- built), either pizeo or magnetic just apply the rated current and voltage.
For the external-drive buzzer, it depends on,
1. We should give magnetic buzzer 1/2 square wave, and provide it at least 3 times the amount of the rated consumptive current.
2. Otherwise, we give square wave to the peizo buzzer instead of 1/2 square wave, because the half wave might cause the buzzer does not work.Therefore, voltage control is an important factor for a peizo buzzer which is driven by the voltage.
Showing posts with label Voltage. Show all posts
Showing posts with label Voltage. Show all posts
5/19/08
3/13/08
Acoustic keyword
W ( Watt ): A watt = a voltage x an ampere. For example, 330 Watt= 110V x 3 A.
V ( Voltage ): V is the unit of voltage, when it needs one joule of work to sent one coulomb of electric from one point to another point, then the potential difference between these two points is one voltage.
Ohm: Ohm is the unit of impedance in electronics, the higher the impedance is, the less electric current can pass through.
Hz( Hertz): The frequency of the sound waves vibrate every second. For instance, 100Hz means 100 times vibration in one second.
dB ( Decibel): dB is the unit of the sound pressure level, which is calculated with logarithm, because the susceptibility to the sound of human ears is not linear.
Fo ( Resonance Frequency): Fo stands for the resonance point of the speaker. The lower the Fo is, the efficiency of the low frequency is better.
S.P.L. ( Sound Pressure Level): The volume of the sound.
Vo-p: The measurement from Vo to the peak, to drive the magnetic buzzer, the waveform is 1/2 square wave.
Vp-p: The measurement from peak to peak, to drive the piezo buzzer. The waveform is square wave.
V ( Voltage ): V is the unit of voltage, when it needs one joule of work to sent one coulomb of electric from one point to another point, then the potential difference between these two points is one voltage.
Ohm: Ohm is the unit of impedance in electronics, the higher the impedance is, the less electric current can pass through.
Hz( Hertz): The frequency of the sound waves vibrate every second. For instance, 100Hz means 100 times vibration in one second.
dB ( Decibel): dB is the unit of the sound pressure level, which is calculated with logarithm, because the susceptibility to the sound of human ears is not linear.
Fo ( Resonance Frequency): Fo stands for the resonance point of the speaker. The lower the Fo is, the efficiency of the low frequency is better.
S.P.L. ( Sound Pressure Level): The volume of the sound.
Vo-p: The measurement from Vo to the peak, to drive the magnetic buzzer, the waveform is 1/2 square wave.
Vp-p: The measurement from peak to peak, to drive the piezo buzzer. The waveform is square wave.
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