The simplest type of eardrop is ordinary olive oil
Hush Smart Earplugs Hearable
Hush Smart Earplugs provide assistance while you sleep. The end tip comes in three different fit options: silicone, memory form and custom mould. These smart earplugs will play soothing sounds such as white noise and natural sounds to help you sleep. You can also program them via your smartphone to interupt your sleep for specific calls or alarms that only you will hear.