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This white paper will explore how haptic technology enhances user experiences by integrating touch feedback into devices such as smartphones, game controllers, and smartwatches. It will examine the challenges manufacturers face in maintaining consistent haptic performance across devices and discuss various testing methods used in production. Traditional approaches like Laser Doppler Vibrometry (LDV) and accelerometer-based testing will be analyzed, highlighting their limitations in cost, complexity, and environmental sensitivity. The paper will also introduce microphone-based testing as a cost-effective, non-invasive solution that balances accuracy and efficiency, making it ideal for large-scale production environments.