Sound pressure level calibration using smart devices for voice recording

Abstract

It is crucial to record physical recording conditions to acquire reusable speech materials. Sensitivity calibration of the recording system is the first step to assure reusability. This article discusses the possibilities and current status of smartphone-based calibration because smart devices are pervasive these days. Data acquisition in everyday life conditions requires recording devices and assessment of procedures with their error limits. This article makes use of discrete-time signal processing enabled by modern digital devices.