> ## Documentation Index
> Fetch the complete documentation index at: https://developers.telnyx.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List available noise suppression engines

> Returns all noise suppression engines available to the authenticated user. Engines gated behind a feature flag are included only when the flag is enabled for the user's account. Results are not paginated; the number of engines is expected to remain small.



## OpenAPI

````yaml /openapi/source/external/noise-suppression-engines/noise-suppression-engines.json get /noise_suppression_engines
openapi: 3.0.0
info:
  version: 1.0.0
  title: Noise Suppression Engines API
  contact:
    email: support@telnyx.com
servers:
  - url: https://api.telnyx.com/v2
    description: Version 2.0.0 of the Telnyx API
security:
  - bearerAuth: []
tags:
  - name: Noise Suppression Engines
    description: >-
      Noise suppression engines that can be selected when configuring noise
      suppression on voice connections.
paths:
  /noise_suppression_engines:
    get:
      tags:
        - Noise Suppression Engines
      summary: List available noise suppression engines
      description: >-
        Returns all noise suppression engines available to the authenticated
        user. Engines gated behind a feature flag are included only when the
        flag is enabled for the user's account. Results are not paginated; the
        number of engines is expected to remain small.
      operationId: listNoiseSuppressionEngines
      responses:
        '200':
          description: >-
            A list of noise suppression engines available to the authenticated
            user
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NoiseSuppressionEnginesListResponse'
              example:
                data:
                  - value: denoiser
                    label: Denoiser
                    default_attenuation_level: 0
                  - value: deep_filter_net
                    label: DeepFilterNet
                    default_attenuation_level: 80
        '401':
          description: >-
            Unauthorized — the request did not carry valid Telnyx API
            credentials
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              example:
                errors:
                  - code: '10009'
                    title: Authentication failed
                    detail: >-
                      The required authentication headers were either invalid or
                      not included in the request.
components:
  schemas:
    NoiseSuppressionEnginesListResponse:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/NoiseSuppressionEngine'
      required:
        - data
    ErrorResponse:
      type: object
      properties:
        errors:
          type: array
          items:
            type: object
            required:
              - code
              - title
            properties:
              code:
                type: string
              title:
                type: string
              detail:
                type: string
              meta:
                type: object
                properties:
                  url:
                    type: string
              source:
                type: object
                properties:
                  pointer:
                    type: string
      required:
        - errors
    NoiseSuppressionEngine:
      type: object
      description: A noise suppression engine available to the authenticated user.
      properties:
        value:
          type: string
          description: >-
            Machine-readable identifier of the engine, used when configuring
            noise suppression.
          example: denoiser
        label:
          type: string
          description: Human-readable name of the engine.
          example: Denoiser
        default_attenuation_level:
          type: integer
          description: >-
            Default attenuation level of the engine (0-100, in multiples of
            ten).
          minimum: 0
          maximum: 100
          multipleOf: 10
          example: 0
      required:
        - value
        - label
        - default_attenuation_level
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer

````