When one wants to block out the sounds of the world, active noise cancelling is the feature to look for. Now, Qualcomm is one-upping active noise cancelling with adaptive active noise cancellation. Their first product to support this adaptive ANC will be the Qualcomm QCC514x Bluetooth SoC.
According to Qualcomm, the new adaptive ANC (AANC

Source: Hot Hardware – Qualcomm Launches Adaptive Active Noise Cancellation Tech For Next-Gen Wireless Earbuds