This invention relates to a method of identifying a modulator of an NADPH oxidase, whereby said modulator is suitable as a lead compound and/or as a medicament for the treatment and/or prevention of hearing loss and/or phantom hearing, the method comprising the steps of (a) contacting a test compound with a protein, wherein said protein (i) comprises or consists of the amino acid sequence of any one of SEQ ID NO: 1, 3 or 5, or (ii) is encoded by a nucleic acid comprising or consisting of the sequence of any one of SEQ ID NO: 2, 4, 6, 23 or 24, or (iii) is a fragment of the protein according to (i) or (ii) and exhibits NADPH oxidase activity, or (iv) has a sequence at least 75% identical with the protein according to (i) or (ii) or with the fragment according to (iii) and exhibits NADPH oxidase activity, and optionally with one or more NADPH oxidase subunits, under conditions allowing binding of said test compound to said protein or, if present, said subunit(s); (b) optionally determining whether said test compound binds to said protein or, if present, said subunit(s); and (c) determining whether (ca) said test compound, upon contacting in step (a); or (cb) said test compound, upon binding in step (b) modulates the expression and/or activity of said protein or, if present, said subunit(s). Also provided are pharmaceutical compositions, medical uses and diagnostic uses of compounds of the invention.