The use of in-situ audiometry for hearing aid fitting is appealing due to its reduced resource and equipment requirements compared to standard approaches employing conventional audiometry alongside real-ear measures. However, its validity has been a subject of debate, as previous studies noted differences between hearing thresholds measured using conventional and in-situ audiometry. The differences were particularly notable for open-fit hearing aids, attributed to low-frequency leakage caused by the vent. Here, in-situ audiometry was investigated for six receiver-in-canal hearing aids from different manufacturers through three experiments. In Experiment I, the hearing aid gain was measured to investigate whether corrections were implemented to the prescribed target gain. In Experiment II, the in-situ stimuli were recorded to investigate if corrections were directly incorporated to the delivered in-situ stimulus. Finally, in Experiment III, hearing thresholds using in-situ and conventional audiometry were measured with real patients wearing open-fit hearing aids. Results indicated that (1) the hearing aid gain remained unaffected when measured with in-situ or conventional audiometry for all open-fit measurements, (2) the in-situ stimuli were adjusted for up to 30 dB at frequencies below 1000 Hz for all open-fit hearing aids except one, which also recommends the use of closed domes for all in-situ measurements, and (3) the mean interparticipant threshold difference fell within 5 dB for frequencies between 250 and 6000 Hz. The results clearly indicated that modern measured in-situ thresholds align (within 5 dB) with conventional thresholds measured, indicating the potential of in-situ audiometry for remote hearing care.

Hearing loss is the commonest sensory deficit among humans, affecting 466 million people worldwide. Early detection is the key to hearing rehabilitation, as speech and language develops early in the childhood. Scarcity of human resources and infrastructure in developing countries like India leads to difficulty in implementation of hearing screening programmes. Tele otology is very fruitful methodology in providing health care facility from distant site to the doorsteps of needy individuals. The action initiated in the field of tele otology in India was reviewed at electronic databases: Pubmed, Google scholar, Medline, Cochrane library, science direct and author mapper using the keywords \'tele otology\' and \'tele audiometry\' in January 2021. Eligible studies were those related to tele otology and tele audiometry in India. A total of 16 articles were shortlisted for the present study. Tele hearing testing was satisfactory for the parents in regard to accessibility, testing process and counselling. Tele audiometry surveillance shows better overall follow-up compliance rate then in-person audiological surveillance. During covid 19 pandemic virtual approach to the patient through video calling and telephone calls proved handy approach, ensuring safety profile of both health care professionals and patients. Even Tele ABR conducted in tele van shows similar results as in face-to-face mode ABR. Tele otology should be considered by the service providers and policy makers while planning for hearing screening programmes for both new-born and school going children in view of its reliability, low-cost, non-invasive and portability. The village health workers (VHWs) should be well trained in assisting tele practice and internet connectivity should be well established. Tele otology looks very promising in providing health services through the ever-expanding reach of global connectivity.