Listening to Music During the Year of Mourning if it Helps with Work

A person in the year of mourning for his mother, working in a job that requires a lot of energy, and listening to music helps him at work. Can he be lenient and listen to music at work?

If it helps him with work, it is possible to be more lenient.

Talmud, Sotah, page 48, side 1: "Rav Huna said: The songs of the boatmen (Rashi explains: those pulling ships with a rope) are permitted, as they only encourage them in their work. And the songs of the plowmen (Rashi explains: they sing while plowing to guide the oxen along the furrows, as they follow the pleasant sound of the song) are permitted. The songs of the weavers are forbidden. Rav Huna abolished music, and a hundred geese cost one zuz, and a hundred seah of wheat cost one zuz, and no one needed it. Rav Chisda came and disregarded it, and a goose for a zuz was not found. Regarding the distinction between weavers and boatmen and plowmen, Rashi wrote that weavers do so for amusement, and in Aruch it is explained that the songs of the weavers contain profanity. The Mishnah Berurah also wrote in Siman 560, S"K 13, and it can be compared to mourning, where joy is forbidden, and if one needs to listen to music, there is more room for leniency."