<prompt> Carharts notch is seen in-Meneires diseaseOtoscleroisAcousticneuromaGlomus tumour  <response>: Ans. is b i.e., Otosclerois Pure tone audiometry in otosclerosiso Shows loss of air conduction, more for lower frequencies with characteristic rising patterno Bone conduction is normal. However in some cases, there is a dip in bone conduction curve which is maximum at 2000 Hz 2 KHz and is called the Carharts notcho Dip in bone conduction in otosclerosis Carharts notch - 2000 Hzo Dip in noise induced hearing loss Acoustic dip - 4000 Hz 