Damage may be a result of the direct effects of alcohol on the brain or may result indirectly, from a poor general health status or from severe liver disease. For example, thiamine deficiency is a common occurrence in people with alcoholism and results from poor overall nutrition.
In the case of a longitudinal wave, a wavelength measurement is made by measuring the distance from a compression to the next compression or from a rarefaction to the next rarefaction. On the diagram above, the distance from point A to point C or from point B to point D would be representative of the wavelength.
Just like the wavelength of a transverse wave is the distance from crest to crest or trough to trough, the wavelength of a longitudinal wave is the distance between compressions or between rarefactions. Traveling Through Solids, Liquids and Gases. When it comes to mechanical waves, transverse and longitudinal waves are not equal.