Understanding the Decibel (dB) in Audio Measurements
Publication Number: 5990-4503EN
Publication Date: 2017.12.01
Language: English
Application Notes

Understanding the Decibel (dB) in Audio Measurements

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The decibel in audio measurement

In the radio frequency (RF) microwave test and measurement world, engineers often deal with the power measurement unit of dBm instead of wattage, which is commonly known as watt (W). However, engineers entering the audio measurement arena will need to understand one more measurement unit known as dBu, which is decibel (dB) relative to 1 mW into 600 Ω. This application note explains dBu and provides useful tips to assist you in accurately making and understanding audio measurements.