diff --git a/.changeset/metal-cases-beg.md b/.changeset/metal-cases-beg.md
new file mode 100644
index 00000000..a0e1af05
--- /dev/null
+++ b/.changeset/metal-cases-beg.md
@@ -0,0 +1,5 @@
+---
+'@openai/agents-realtime': patch
+---
+
+support noise reduction argument
diff --git a/docs/src/content/docs/guides/voice-agents/quickstart.mdx b/docs/src/content/docs/guides/voice-agents/quickstart.mdx
index 24621517..7215be9d 100644
--- a/docs/src/content/docs/guides/voice-agents/quickstart.mdx
+++ b/docs/src/content/docs/guides/voice-agents/quickstart.mdx
@@ -113,6 +113,7 @@ import thinClientExample from '../../../../../../examples/docs/voice-agents/thin
 From here you can start designing and building your own voice agent. Voice agents include a lot of the same features as regular agents, but have some of their own unique features.
 
 - Learn how to give your voice agent:
+
   - [Tools](/openai-agents-js/guides/voice-agents/build#tools)
   - [Handoffs](/openai-agents-js/guides/voice-agents/build#handoffs)
   - [Guardrails](/openai-agents-js/guides/voice-agents/build#guardrails)
diff --git a/docs/src/content/docs/ja/guides/voice-agents/quickstart.mdx b/docs/src/content/docs/ja/guides/voice-agents/quickstart.mdx
index c1ca7382..65709c47 100644
--- a/docs/src/content/docs/ja/guides/voice-agents/quickstart.mdx
+++ b/docs/src/content/docs/ja/guides/voice-agents/quickstart.mdx
@@ -113,6 +113,7 @@ import thinClientExample from '../../../../../../../examples/docs/voice-agents/t
 ここからは、独自の音声エージェントの設計と構築を進めましょう。音声エージェントは通常のエージェントと多くの機能を共有していますが、いくつか固有の機能もあります。
 
 - 音声エージェントに以下を追加する方法を学ぶ
+
   - [ツール](/openai-agents-js/ja/guides/voice-agents/build#tools)
   - [ハンドオフ](/openai-agents-js/ja/guides/voice-agents/build#handoffs)
   - [ガードレール](/openai-agents-js/ja/guides/voice-agents/build#guardrails)
diff --git a/packages/agents-realtime/src/clientMessages.ts b/packages/agents-realtime/src/clientMessages.ts
index 0b530d6e..2fe74ed0 100644
--- a/packages/agents-realtime/src/clientMessages.ts
+++ b/packages/agents-realtime/src/clientMessages.ts
@@ -33,6 +33,10 @@ export type RealtimeTracingConfig =
     }
   | 'auto';
 
+export type RealtimeInputAudioNoiseReductionConfig = {
+  type: 'near_field' | 'far_field' | (string & {});
+};
+
 export type RealtimeInputAudioTranscriptionConfig = {
   language?: string;
   model?:
@@ -83,6 +87,7 @@ export type RealtimeSessionConfig = {
   tools: FunctionToolDefinition[];
   tracing?: RealtimeTracingConfig | null;
   providerData?: Record<string, any>;
+  inputAudioNoiseReduction: RealtimeInputAudioNoiseReductionConfig | null;
   speed: number;
 };
 
diff --git a/packages/agents-realtime/src/openaiRealtimeBase.ts b/packages/agents-realtime/src/openaiRealtimeBase.ts
index e0fbba82..7903bb95 100644
--- a/packages/agents-realtime/src/openaiRealtimeBase.ts
+++ b/packages/agents-realtime/src/openaiRealtimeBase.ts
@@ -65,6 +65,7 @@ export const DEFAULT_OPENAI_REALTIME_SESSION_CONFIG: Partial<RealtimeSessionConf
     turnDetection: {
       type: 'semantic_vad',
     },
+    inputAudioNoiseReduction: null,
     speed: 1,
   };
 
@@ -393,6 +394,9 @@ export abstract class OpenAIRealtimeBase
       input_audio_transcription:
         config.inputAudioTranscription ??
         DEFAULT_OPENAI_REALTIME_SESSION_CONFIG.inputAudioTranscription,
+      input_audio_noise_reduction:
+        config.inputAudioNoiseReduction ??
+        DEFAULT_OPENAI_REALTIME_SESSION_CONFIG.inputAudioNoiseReduction,
       turn_detection:
         OpenAIRealtimeBase.buildTurnDetectionConfig(config.turnDetection) ??
         DEFAULT_OPENAI_REALTIME_SESSION_CONFIG.turnDetection,