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# 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

[`static func amplitudeToDecibels<U>(U, zeroReference: Float) -> [Float]`](/documentation/Accelerate/vDSP/amplitudeToDecibels(_:zeroReference:)-88bpy)

Returns single-precision amplitude values converted to decibels.

[`static func powerToDecibels<U>(U, zeroReference: Float) -> [Float]`](/documentation/Accelerate/vDSP/powerToDecibels(_:zeroReference:)-861j5)

Returns single-precision power values converted to decibel values.

[`static func convert<U, V>(amplitude: U, toDecibels: inout V, zeroReference: Float)`](/documentation/Accelerate/vDSP/convert(amplitude:toDecibels:zeroReference:)-83uy1)

Converts single-precision amplitude values to decibel values.

[`static func convert<U, V>(power: U, toDecibels: inout V, zeroReference: Float)`](/documentation/Accelerate/vDSP/convert(power:toDecibels:zeroReference:)-5u3vs)

Converts single-precision power values to decibel values.

[`extern void vDSP_vdbcon(const float *__A, vDSP_Stride __IA, const float *__B, float *__C, vDSP_Stride __IC, vDSP_Length __N, unsigned int __F);`](/documentation/Accelerate/vDSP_vdbcon)

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

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

[`static func amplitudeToDecibels<U>(U, zeroReference: Double) -> [Double]`](/documentation/Accelerate/vDSP/amplitudeToDecibels(_:zeroReference:)-2cgik)

Returns double-precision amplitude values converted to decibel values.

[`static func powerToDecibels<U>(U, zeroReference: Double) -> [Double]`](/documentation/Accelerate/vDSP/powerToDecibels(_:zeroReference:)-4b0qz)

Returns double-precision power values converted to decibel values.

[`static func convert<U, V>(amplitude: U, toDecibels: inout V, zeroReference: Double)`](/documentation/Accelerate/vDSP/convert(amplitude:toDecibels:zeroReference:)-4io4p)

Converts double-precision amplitude values to decibel values.

[`static func convert<U, V>(power: U, toDecibels: inout V, zeroReference: Double)`](/documentation/Accelerate/vDSP/convert(power:toDecibels:zeroReference:)-3aiv4)

Converts double-precision power values to decibel values.

[`extern void vDSP_vdbconD(const double *__A, vDSP_Stride __IA, const double *__B, double *__C, vDSP_Stride __IC, vDSP_Length __N, unsigned int __F);`](/documentation/Accelerate/vDSP_vdbconD)

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


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