.. _auto_curve_todb:

*CONVERT REAL CURVE TO DB*
==========================

Converts a real-valued (linear) pressure or amplitude curve to decibels (dB) by applying a 20·log10 transformation, with an optional pressure scaling factor applied before conversion. Use this worker whenever NVH or acoustic workflows require a linear signal curve to be expressed in the dB domain.

When to use
-----------

Classification: **process**.

Tagged: ``acoustic``, ``curve_transform``, ``dB``, ``decibel``, ``linear_to_db``, ``log10``, ``nvh``, ``pressure``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve
     - curve
     - vector
     - —
     - 
     - Input real-valued (linear scale) curve, typically a pressure or amplitude vs. frequency/time vector, to be converted to dB; leave unconnected only if the worker is used in a chain where the curve is injected programmatically.
   * - Pressure SF
     - pressure_s_f
     - scalar
     - —
     - 
     - Scalar pressure reference / scaling factor applied to the curve values before the dB conversion (e.g. 2×10⁻⁵ Pa for standard SPL reference); leave as default (null) to apply no scaling.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - curve_todb_output_1
     - curve_todb_output_1
     - vector
     - Output curve with Y-axis values expressed in decibels (dB), computed as 20·log10(scaled_input); X-axis is preserved unchanged from the input curve.

Disciplines
-----------

- data.curve.transform
- data.signal_processing
- engineering.nvh

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=curve_todb <https://www.d3view.com/api/workflow/example?id=curve_todb>`_

.. raw:: html

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   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_todb</code>. Schema hash: <code>7f488f0b345d</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>