A helmet is homologated when it has obtained a certification from an official authority. The authority that is ultimately authorised to issue the certificate is in most countries a government department that is responsible for metrology. The exact same authority can also be granted to an independent organisation within that country. Subsequently, a series of tests are performed by authorized test institutes.
Why acquiring a homologated helmet?
In our current market, helmets often need to be homologated by some government agency to ensure that the devices measure correctly or make correct observations, even in extreme conditions and in all environmental conditions (temperature, rain, wind strength, radiation, etc.).
Last but not least!
Model helmets approved and certified are requested in most of the countries and and can have a high price. Just make sure you have the correct homologation before you acquire a helmet!