I am having trouble finding out what the equation for damped harmonic motion is. I have been researching around there there are many small variations on the exponents. I am conducting an experiment which has involved the use of the spring constant from Hooke's Law and have used a hypothesis which relates the two together. However, I can't seem to find a credible source for a damped harmonic motion equation when using springs. Hopefully, I was wondering whether someone could give one to me here? Thanks.