Posted on 20-07-2010 by microbuzzer
Speaker’s power is some of the specific technical conditions loudspeaker power amplifier obtained from the electric power introduced by the speaker unit electric power consumption, not the speaker sound power generated by unit. Obtained from the PA speaker in most of the energy converted into heat, only a small part is converted into sound. Sound [...]
Tags: power, speaker, Speaker unit
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Posted on 19-07-2010 by microbuzzer
Speaker frequency response curve
Speaker frequency response curve, which is a record in the width of 5cm or lOcm irregular curve of the continuous recording paper.
X-axis represents the input signal frequency of the speaker unit;
Y axis represents the measured loudspeaker signals at different frequencies when the sound pressure level generated.
We the human ear can hear the [...]
Tags: curve, Frequency Response, speaker
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Posted on 19-07-2010 by microbuzzer
Speaker resonant frequency
Impedance curve of the impedance of the speaker unit reaches its maximum when the first frequency corresponding to the speaker unit is called the resonant frequency or resonant frequency, called fo.
To facilitate understanding, the speaker of the vibration system can be that Cone, voice coil and the dust cover as a certain [...]
Tags: resonant frequency, speaker
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Posted on 19-07-2010 by microbuzzer
Midrange is the car speakers in the midrange unit, whose role is the IF signal from the divider output (usually in the frequency range of 150Hz-5KHz) playback. In general, Midrange frequency response curve flat as long as the effective frequency response range than it aloud in the system responsible for the band width, impedance and [...]
Tags: bass speaker, speaker
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Posted on 18-07-2010 by microbuzzer
Buzzers: piezoelectric PZT film sound effects, infinite DC resistance, AC impedance is great;
Moving coil speaker: permanent magnetic field in general is driven cone vibrating voice coil, DC resistance is almost 0, EIS general a few dozen in Europe to Europe;
Buzzer: the need for a larger voltage to drive, but the current is very small, a [...]
Tags: Active buzzer, Buzzer, difference, passive buzzer
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Posted on 17-07-2010 by microbuzzer
DB describe the loudness of sound physical
DB (decibel) dB is named after American inventor Alexander Graham Bell, and he is famous for the invention of telephone. Because Bell’s unit is too rough and not fully used to describe our feeling of the sound, so preceded by the “points”, which on behalf of one tenth. A [...]
Tags: db, decibels, meaning, sound
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Posted on 17-07-2010 by microbuzzer
Electromagnetic and piezoelectric buzzer is divided into two major categories of style
Electromagnetic buzzer is electromagnetic theory, power absorption when the metal diaphragm, the diaphragm is not under power when the elastic bounce. Passive magnetic buzzer to 1 / 2 square wave drive, magnetic buzzer, can be issued with a 1.5V 85dB SPL above, and the [...]
Tags: Buzzer, Categories
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Posted on 17-07-2010 by microbuzzer
Sine wave sweep signal
20Hz ~ 20kHz sine wave frequency sweep signal from 20Hz to 20kHz frequency changes automatically smooth playback test by playing this paragraph where the information can quickly determine the frequency problems.
20 Hz ~ 63 Hz sine wave
Man auditory ELF 20Hz lower limit, to test your speakers low frequency playback limit, low frequency [...]
Tags: frequency, Sine wave, sound
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Posted on 16-07-2010 by microbuzzer
How to better grasp the buzzer test, method?
Buzzer exterior inspection
Buzzer surface of uniform, smooth, no distortion, warping phenomenon. Aluminum without grooves, riveting sound, no loose gaps. Silver layer is smooth, no rupture phenomenon. Lead without damage, even joints, bright, without drawing sharp, Weld, and loose soldering phenomenon.
Tags: Buzzer, method, test
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Posted on 16-07-2010 by microbuzzer
Frequency (frequency) is a unit of time to complete the vibration frequency of vibrating object is to describe the amount of reciprocating frequency, commonly used symbols f or v, said in seconds -1. To commemorate the contribution of the German physicist Hertz, people named the Hertz unit of frequency, referred to as “He” is also [...]
Tags: frequency, infrasound meaning, ultrasound
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