Why Is Gain Often Expressed in Decibels?

💡 The Answer

• Gain is often expressed using logarithmic decibel (dB) units.
• Decibels allow representing very large or small ratios compactly.
• A gain of 10 in linear terms equals 20 dB for voltage or 10 dB for power.
• Using dB makes it easier to compare gains across systems and components.
• The logarithmic scale matches human perception for signals like sound.