<!--
{
  "documentType" : "article",
  "framework" : "Accelerate",
  "identifier" : "/documentation/Accelerate/conversion-to-decibel-equivalents",
  "metadataVersion" : "0.1.0",
  "role" : "collectionGroup",
  "title" : "Conversion to decibel equivalents"
}
-->

# Conversion to decibel equivalents

Convert vectors that contain power or amplitude data to decibels.

## Topics

### Converting single-precision power or amplitude values to decibel values

[`amplitudeToDecibels(_:zeroReference:)`](/documentation/Accelerate/vDSP/amplitudeToDecibels(_:zeroReference:)-88bpy)

Returns single-precision amplitude values converted to decibels.

[`powerToDecibels(_:zeroReference:)`](/documentation/Accelerate/vDSP/powerToDecibels(_:zeroReference:)-861j5)

Returns single-precision power values converted to decibel values.

[`convert(amplitude:toDecibels:zeroReference:)`](/documentation/Accelerate/vDSP/convert(amplitude:toDecibels:zeroReference:)-83uy1)

Converts single-precision amplitude values to decibel values.

[`convert(power:toDecibels:zeroReference:)`](/documentation/Accelerate/vDSP/convert(power:toDecibels:zeroReference:)-5u3vs)

Converts single-precision power values to decibel values.

[`vDSP_vdbcon`](/documentation/Accelerate/vDSP_vdbcon)

Converts single-precision power or amplitude values to decibel values.

### Converting double-precision power or amplitude values to decibel values

[`amplitudeToDecibels(_:zeroReference:)`](/documentation/Accelerate/vDSP/amplitudeToDecibels(_:zeroReference:)-2cgik)

Returns double-precision amplitude values converted to decibel values.

[`powerToDecibels(_:zeroReference:)`](/documentation/Accelerate/vDSP/powerToDecibels(_:zeroReference:)-4b0qz)

Returns double-precision power values converted to decibel values.

[`convert(amplitude:toDecibels:zeroReference:)`](/documentation/Accelerate/vDSP/convert(amplitude:toDecibels:zeroReference:)-4io4p)

Converts double-precision amplitude values to decibel values.

[`convert(power:toDecibels:zeroReference:)`](/documentation/Accelerate/vDSP/convert(power:toDecibels:zeroReference:)-3aiv4)

Converts double-precision power values to decibel values.

[`vDSP_vdbconD`](/documentation/Accelerate/vDSP_vdbconD)

Converts single-precision power or amplitude values to decibel values.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)