The advantages of the electret condenser microphone 電容式麥克風的優點

1. Transform sound into electric signal- The best design in theory:
The design of electret condenser microphones is based on the theorem that we use charging and discharging motion
between electric capacity conductors. When the ultra-thin or gold-plating Mylar diaphragm response to the sound
pressure level, it changes the static electricity between the conductors into electric signal directly. Then we can gain
a proper output of impedance and sensitivity by the electric circuit coupling.
1、能將聲音直接轉換成電能訊號的最佳設計原理：
電容式麥克風是利用導體間的電容充放電原理，以超薄的金屬或鍍金的塑膠薄膜為振動膜感應音壓，
以改變導體間的靜電壓直接轉換成電能訊號，經由電子電路耦合獲得實用的輸出阻抗及靈敏度設計而成。

2. The characteristic of reappearing the original sound:
To reappear the original sound is the highest performance for the acoustic specialist to achieve. If we check the basic
design of the microphone, we can find a electret condenser microphone can transform the sound into electric signal
directly, because it is not only manufactured with accurate mechanism technique, but also combine complicated electric
circuit. Therefore, with the excellent characteristic in advance, the electret condenser microphone must be your best choice.
2、能展現『原音重現』的特性：
音響專家以追求『原音重現』為音響的最高境界！從麥克風的基本設計原理分析，不難發現電容式麥克風
不僅靠精密的機構製造技術，而且結合複雜的電子電路，能直接將聲音轉換成電能訊號，先天上就具有極
優越的特性，所以成為追求『原音重現』者的最佳選擇。

3. Very wild frequency response:
Diaphragm is a main component of a microphone to sense the sound and to transform it into the electric signal.
The material and the mechanical design of the diaphragm decide the acoustics of a microphone. Due to the material
of the diaphragm is very thin and light, and can transform the sound into electric signal directly; the range of the
frequency response can reach to the ultra-low frequency (under 10 Hz), and the high frequency can also gets to
supersonic easily, which shows the characteristic of wild frequency response.
3、具有極為寬廣的頻率響應：
振動膜是麥克風感應聲音及轉換為電能訊號的主要元件。振動膜的材質及機構設計，是決定麥克風音質的
各項特性。由於電容式麥克風的振動膜可以採用極輕薄的材料製成，而且感應的音壓，直接轉換成音頻訊
號，所以頻率響應低音可以延伸到10Hz以下的超低頻，高音可以輕易的達到數十KHz的超音波，展現非常
寬廣的頻率響應特性！
The diaphragm of the dynamic microphone loads a sound coil which is hundreds times heavier than itself. (Left picture)
The diaphragm of the electret condenser microphone works without any load. (Right picture)
動圈式麥克風的振動膜(左)負載了比本身重達幾百倍以上的音圈,
電容式麥克風的振動膜(右圖)沒有任何負載

Basic vocabulary in acoustics / 聲學的基本名辭

The physical character of soundSound: The pressure wave which is vibrated in the elastic medium.Wave: The presentation of passing the energy from one place to another place.Wavelength: The length of one cycle of the wave.Frequency: The amount of the cycles within one second. Measurement is Hz.Period: The total time to complete a cycle.Velocity: The speed of the motion of the wave.Velocity = Wavelength × Frequency
聲音的物理特性聲音(Sound): 在彈性介質(Elastic Medium)中受到震動而產生的壓力波.波(Wave): 將能量由一點傳遞到另一點所呈理的型態.波長(Wavelength): 一次循環在空間中所佔據的長度.頻率(Frequency): 在一秒中內所完成的循環數(Cycle). 單位是Hz.週期(Period): 用來完成一個循環(Cycle)所需的時間.波速(Velocity): 波運動的速度.波速 = 波長 * 頻率
The velocity of sound are associated with the medium.Density: The higher density medium results in higher velocity.Elasticity: The higher elasticity medium results in higher velocity.Energy: In the atmosphere, the higher temperature results in higher velocity, the formula as following:Vs = 331 m/s + 0.6tTherefore, at 20℃, the velocity is 331+20*0.6=343 m/sec.
音速的快慢與介質有關, 密度(Density) : 通常在密度愈高的介質中,音速會愈快.彈性(Elasticity): 通常在彈性愈高的介質中,音速會愈快.能量(Energy): 在空氣中,溫度愈高,音速愈快,公式如下:Vs = 331 m/s + 0.6t故20度C時,音速為 331+20*0.6=343 m/sec.
Amplitude: The measurement of a molecule moving in the medium, it stands for the sound pressure level.Root Mean Square: The root is 0.707 times of the biggest amplitude.Average: 0.637 times of the biggest amplitude.Resonate Frequency: The frequency of the object vibrating.Free field: A clear space, without any reflection waves.
振幅(Amplitude): 某分子在介質中位移的測量值,用來表示聲音的音量.RMS ( Root Mean Square) 方均根值是最大振幅的0.707倍平均值(Average) : 最大振幅的0.637倍並嗚頻率(Resonate Frequency): 物體振動的自然頻率.自然音場(Free Field) : 沒有障礙物,沒有反射聲波的音場/空間.

聲音的六種現象

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苙翔科技的blog

hi~

我們的blog開張囉~
請您留下有關聲學或是電聲零件的問題,
我們可以一起找出答案!!

Advanced Acoustic Technology Corp.

Hi ~

The blog is bulid for our customers and staffs,
to discuss any topic about acoustic or components,

Our main products:
Magnetic Buzzer, Piezo Buzzer, Condenser Microphone, Micro Speaker,

Our web:
http://www.aatc.tw/ http://www.buzzer-speaker.com/

Michael