Noise emissions from machinery are the main source of noise exposure for workers. To combat this risk at source, the European Machinery Directive requires the declaration of the main noise emission parameter, the sound power level. This quantity is determined according to 10 different EN ISO standards, requiring special laboratory environments or complex measurement techniques (reference sound sources, intensity probes, etc.). This high level of effort is considered to be a major reason why, despite legal requirements, noise data in instructions for 80% of machinery is unreliable or unavailable (NOMAD study). This project aims to reduce the measurement effort for machinery manufacturers, test houses and occupational health and safety personnel. To this end, existing methods, e.g., EN ISO 3744, that determine sound power from sound pressure measurements at discrete positions on the enveloping measurement surface around the machine shall be complemented by a new method based on manual sound pressure scans on the measurement surface. Ideally, these can be performed with a single microphone connected to a sound level meter. We present the results of first measurements on a model machine.