1. An apparatus for determining of an object material of which an object consists, comprising: an irradiator-receiver pair for irradiating the object and receiving a resulting radiation with a first polyfrequent effective spectrum, transmitted through the object or reflected from the object, in order to obtain a first intensity value, and for irradiating the object and receiving a resulting radiation with a second polyfrequent effective spectrum, transmitted through the object or reflected from the object, in order to obtain a second value, wherein the first polyfrequent effective spectrum differs from the second polyfrequent effective spectrum; a provider for providing reference data for a plurality of predetermined materials; and a processor for associating the object material with one of the predetermined materials on the basis of the reference data, a combination value based on the first and the second information value, as well as at least the first or second intensity value.