>Music which contains drones and is rhythmically still or very slow, called "drone music",[2] can be found in many parts of the world, including bagpipe traditions, among them Scottish pibroch piping; didgeridoo music in Australia, South Indian classical Carnatic music and Hindustani classical music (both of which are accompanied almost invariably by the Tanpura, a plucked, four-string instrument which is only capable of playing a drone); the sustained tones found in the Japanese gagaku[9] classical tradition; possibly (disputed) in pre-polyphonic organum vocal music of late medieval Europe;[10] and the Byzantine chant's ison (or drone-singing, attested after the fifteenth century).[11] Repetition of tones, supposed to be in imitation of bagpipes,[12][13][14][15] is found in a wide variety of genres and musical forms.

https://en.wikipedia.org/wiki/Drone_music

Nice.

I am in the process of mourning a death and cannot really abide by listening to conventionally structured music, yet I also need something to shut out the ambient sounds and increase concentration.

I am still debating whether or not I should be doing even this, but it feels necessary and I have already gone a week without music.