The office or studio of a physician, surgeon, dentist, osteopath, chiropractor, psychologist, architect, painter, sculptor, teacher, musician, lawyer or engineer residing in the dwelling unit in which such office or studio shall be located, provided that:
(a) There shall be no display or advertising on the premises in connection with such use, except for a professional nameplate not over one square foot in area.
(b) Such nameplate shall comply with the provisions of Article
XI of this chapter.
(c) Such studio or office shall not occupy more than the equivalent of 1/3 of the area of one floor of such dwelling unit.
(d) Such use shall be merely incidental to the use of such dwelling unit primarily for residential purposes.
(e) Any such musician's studio shall be equipped and used in such a manner that sounds therefrom shall not be unduly annoying to other persons on nearby premises or public places.
(f) No assistants, whether paid or not, may participate in such use, except that one assistant may be employed if the nature of the profession is such as to require an assistant.
(g) No use shall be made of more than one building in connection with such professional use.
(h) Such professional use shall not be deemed to include the right to engage in wholesale or retail trade as such terms are ordinarily understood.