Why do Bluetooth headphones struggle to maintain smooth connectivity with digital devices in some places?

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While walking around with my Bluetooth headphones on, listening to podcasts playing on my phone in my pocket, I notice that the connection gets really poor in some places. The content is playing offline so it is not a network issue, nor is this a result of dying batteries since the problem persists with fully charged headphones and phones. The places where this happens don’t seem to be visibly distinctive but are predictably bad Bluetooth zones. Is it because of too much EMI (electromagnetic interference) in those locations?

In: Technology
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EMI would be the first thing to look for. It uses the 2.4 GHz frequencies and is prone to interference from poorly shielded microwave ovens etc. Bluetooth also functions at a fairly low power so it is more easily interfered with.