An audible anomaly was heard while evaluating a woofer loudspeaker excited with sinusoidal wave signals. Standard testing did not reveal the nature or cause of this unusual sound. Further investigation showed the loudspeaker was producing a frequency component at half the input frequency; a sub-harmonic. Reported cases of sub-harmonic production are rare for woofers; most reports concern compression drivers. In this paper the techniques used to confirm the generation of a sub-harmonic in this woofer are presented. The mechanisms that combined to generate the sub-harmonic are shown. Further examples found in other speakers that exhibit this sound anomaly on occasion are also discussed.
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.
