Keywords: graph, audiogram

Found 2 variants for this sign (click on video to enlarge):

Sign Definition

General Definition

1. A wavy or irregular line drawn on a flat surface, or any thing or any action directly or indirectly associated with this, especially a graph or an audiogram.

As a Noun

1. A mathematical diagram, usually a line or curve, which shows how two or more sets of numbers or measurements are related. English = graph.
2. A graphic representation of the acuteness of someone's hearing in a range of sound frequencies. English = audiogram.

As a Verb or Adjective

1. To draw a graph.