Patent ID: 8218782
Filing Date: 2012-07-10
Classification: G10K

Abstract:
1. A headphone device comprising: sound reproduction means having a diaphragm for performing sound reproduction based on a sound signal; sound pickup means for performing a sound pickup operation; filtering means for applying filtering to a picked-up sound signal, which is obtained based on the sound pickup operation by the sound pickup means, to give a noise-cancelling signal characteristic; combining means for combining the picked-up sound signal that has undergone filtering by the filtering means, and a listening sound signal which is inputted separately as a sound to be listened to by a user, to generate a sound signal supplied to the sound reproduction means; abnormality determination means for determining occurrence or non-occurrence of an abnormal sound, based on a result of detecting a level of a sound signal obtained within a sound signal processing system, the sound signal processing system including the filtering means and the combining means and being coupled between the sound pickup means and the sound reproduction means, and control means for performing a control such that a warning notification is provided, in response to a determination made by the abnormality determination means that an abnormality is present.