There are a few aspects to be noted. One is general CCTV coverage with or without audio, and the second is capturing and storing/sharing conversations between individuals. While the first one is legal, the second one is not legal.
Is audio surveillance legal in the workplace in India?
Legal audio surveillance requires the consent of everyone in the conversation. This is often referred to as "two-party consent" but technically requires permission from all involved parties. Alternatively, a notice regarding the nature of surveillance should be placed in the vicinity of workplaces.
In India, the use of CCTV cameras is governed by the Information Technology (Reasonable Security Practices and Procedures and Sensitive Personal Data or Information) Rules, 2011 under the Information Technology Act, 2000. According to these rules, organizations are required to inform individuals about the collection, storage, and usage of their personal information and obtain their consent for the same. Additionally, organizations are also required to implement reasonable security practices and procedures to protect this information from unauthorized storage, access, sharing, alteration, disclosure, or destruction.
Do I need permission to install CCTV in India?
There is no permission required for installing CCTV at your premises.
There are relevant aspects discussed in this link, which may be helpful to understand this better:
https://www.worktime.com/12-most-ask...onitoring-laws