> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes. # localAudioLevel$ > Observable of the RMS audio level of the local microphone, 0..1. ```ts get localAudioLevel$(): Observable ``` Observable of the RMS audio level of the local microphone, 0..1. Emits at \~30fps while a mic track is active. Engages the local audio pipeline on first subscription. ## **Examples** ```ts call.localAudioLevel$.subscribe((localAudioLevel) => { console.log('localAudioLevel:', localAudioLevel); }); ``` > Observable of the RMS audio level of the local microphone, 0..1.