It was stated that a one-to-one correspondence should not otherwise be expected if such drops in force do not occur over very short time periods (as they did here); the mechanism behind sound dissipation works very differently to that responsible for drops in force in the force-deformation curve. However, it was found that the second derivative of the force-deformation curve linked well with the acoustic signals, indicating the release of energy through the air of fracture events. It was further hypothesised that if the fraction of total dissipated energy in the form of detectable SPL was common to all fracture events, then there should also be a link between the amplitude of the gradient of the force-deformation curve and the amplitude of the acoustic signals. However, this was not evidenced by the data and the reason given for this was related to problems with sound propagation paths in the biscuits.