Bulk calibration method of micro-electromechanical system (MEMS) microphones

Area of Science:

• Electrical Engineering
• Acoustics
• Metrology

Background:

• Growing demand for high-performance micro-electromechanical system microphones (MEMSMs) across various applications.
• Current calibration methods are insufficient for the increasing volume and performance requirements of MEMSMs.
• A need exists for a reliable, cost-effective bulk calibration solution for MEMSM manufacturers.

Purpose of the Study:

• To describe a pilot method for the bulk calibration of precision MEMSMs.
• To assess the feasibility of this method for use by MEMSM manufacturers.
• To compare the uncertainty of the pilot method with established calibration techniques.

Main Methods:

• Development and testing of a pilot bulk calibration method at the UK's National Physical Laboratory.
• Evaluation of the method's applicability for manufacturers and for detachable MEMSMs in devices.
• Comparative analysis of the pilot method's uncertainty against coupler comparison calibration.

Main Results:

• The pilot method was successfully developed and tested.
• The method is potentially usable by MEMSM manufacturers for bulk calibration.
• Uncertainty analysis indicates the pilot method is comparable to existing techniques.

Conclusions:

• The pilot bulk calibration method is a promising foundation for industrial application.
• This method addresses the urgent need for efficient and cost-effective MEMSM calibration.
• Further development could lead to widespread adoption in MEMSM manufacturing and device integration.