If your Sony SRS-NB10 speaker produces crackling or static noise, try the following steps: Check the audio source to ensure the device connected to the speaker is functioning properly and the audio file is not corrupted. Reduce the volume on both the speaker and the connected device to see if the noise persists. Re-establish the connection by disconnecting and reconnecting the Bluetooth connection between the speaker and the device. Update the speaker's firmware by visiting the official Sony support page. If the issue continues, consider contacting Sony customer support for further assistance.