Below are general answers on typical components of a Sound Level Meters & Calibrators from the list of GAO Tek’s sound level meters & calibrators. To facilitate our customers to select our products, we have further classified our clamp meters by their features: acoustic, handheld, multi-function, professional, real-time, rugged and data logging.

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  • Microphone:
    • Type: Typically, GAO Tek’s condenser microphones are used in sound level meters due to their sensitivity and frequency response.
    • Design: GAO Tek’s microphone is housed in a protective casing to prevent damage and ensure accurate measurements.
    • Diaphragm: A thin diaphragm inside GAO Tek’s microphone converts sound pressure variations into electrical signals.
  • Preamplifier:
    • Function: The preamplifier, designed by GAO Tek, amplifies the weak electrical signals from the microphone to a level suitable for further processing.
    • Characteristics: GAO Tek ensures that the preamplifier has low noise and distortion to preserve the accuracy of the measured sound levels.
  • Analog-to-Digital Converter (ADC):
    • Function: Converts the analog signal from GAO Tek’s microphone into digital form for processing by the digital components.
    • Resolution: GAO Tek utilizes higher resolution ADCs to allow for more precise measurements.
  • Digital Signal Processor (DSP):
    • Function: GAO Tek’s DSP processes the digitized signal, applying various filters and algorithms to obtain frequency-weighted sound levels (e.g., A-weighted, C-weighted).
    • Calculations: The DSP from GAO Tek calculates various parameters such as LAF (A-weighted sound level), LCF (C-weighted sound level), and peak levels.
  • Display:
    • Type: GAO Tek commonly uses LCD or LED displays.
    • Information: GAO Tek’s displays show the real-time sound level, measurement parameters, and other relevant information.
  • User Interface:
    • Buttons/Keypad: Allows users to control GAO Tek’s settings, navigate menus, and input calibration data.
    • Menu System: Enables GAO Tek’s users to select measurement modes, frequency weightings, and time weightings.
  • Data Storage:
    • Internal Memory/Storage: Stores measured data for later retrieval and analysis.
    • Data Logging: Some GAO Tek models may offer data logging capabilities for extended monitoring periods.
  • Power Supply:
    • Battery: Most sound level meters from GAO Tek are portable and use rechargeable or replaceable batteries.
    • External Power: Some GAO Tek models may support external power sources for prolonged use.
  • Calibrator (for Calibrators):
    • Sound Source: A known, and stable acoustic signal source used to calibrate GAO Tek’s microphone and the entire measurement system.
    • Calibration Level: Provides a reference sound pressure level for the calibration process.
  • Microcontroller/Processor:
    • Central Processing Unit (CPU): Controls the overall operation of GAO Tek’s sound level meter, handling data processing and user interface interactions.
    • Programming: Runs firmware/software developed by GAO Tek that defines the device’s functionality.
  • Connectivity:
    • Interfaces: USB, Bluetooth, or other interfaces for data transfer and communication with external devices (e.g., computers, printers).
  • Enclosure/Case:
    • Material: Typically made of durable and lightweight materials to protect GAO Tek’s internal components.
    • Design: GAO Tek’s enclosures are designed to minimize external influences on sound measurements.
  • Filters and Attenuators:
    • Frequency Filters: Used to apply frequency weightings (A, C, Z) to the measured signal.
    • Attenuators: Allow for adjustments to GAO Tek’s input sensitivity to accommodate different sound levels.