<optgroup id="r1100"><em id="r1100"></em></optgroup>
  • <span id="r1100"></span>

      <track id="r1100"><i id="r1100"></i></track>
    1. <optgroup id="r1100"><em id="r1100"><del id="r1100"></del></em></optgroup><acronym id="r1100"></acronym>

    2. Welcome to Changzhou InStar Electronics Co., Ltd. website!
      Contact Us???
      Your Position: Home > News > Industry News

      The introduction of the sound frequency of buzzer and the sound pressure of the buzzer

      2017/12/25??????view:
      The sound of a buzzer is a sound wave of a certain frequency produced by an object of a vibratory device.
      Frequency refers to the number of continuous cycles contained in a second, the measurement unit of frequency is "Hertz" Hertz (Hz), the frequency range of human auditory is about 20 20KHZ, which is lower than 20Hz, and higher than 20kHz is ultrasonic. A commonly used product resonant frequency is 2 4KHZ, the resonant frequency of the buzzer to recommend the use of the maximum, and the sound pressure frequency consistent, buzzer sound frequency is high, the corresponding product sounds is higher, the lower the frequency of the sound, the tone is low.
      The buzzer sound pressure signal to work is rated at both ends of the buzzer, the sound pressure level in the distance measured by 10cm numerical dBA. Decibels (dB) is the unit of sound pressure, the greater the number of decibels, the greater the sound.
      一本之道久久免费视频,久热久热无码免费播放,亚洲中文字幕无码不卡电影,日本久久久久久久中文