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The Sony WH-CH720N headphones are over-ear buetooth headphones with Active Noise Canceling (ANC), Passthrough, virtual surround sound, and multi-device pairing capabilities. They support both Bluetooth and auxiliary (Aux) connections.
Purpose:
- General purpose headphones
- Suitable for VR/XR/MR due to audio passthrough feature
- No latency in cable connection, 30-40ms latency via Bluetooth
Pairing: - Press Bluetooth button for 5 seconds until the indicator light blinks.
Full-duplex audio (simultaneous output and microphone input) is possible in the following scenarios:
1. full-duplex using minijack cable:
- Connect to a Y cable (one in, two outs) to the headphones with the provided AUX cable.
- Connect Y cable exits to a Headphone and Microphone to USB adapter.
- Result: Bidirectional sound in mono.
2. full-duplex via Bluetooth:
- Functional on iOS and MacOS (Versions? Software?)
- Not possible on an RPi (still testing possibilities).
3. full-duplex combining Bluetooth and Cable (AUX):
- Bluetooth connection (in or out) not possible when headphones are already connected by aux cable (out or in).
- More details here
Below are Frequency Response and Isolation curves from this review.
Images:
Headphones, case, and included cables:
Troubleshooting: - Issue: Microphone's low input level (only loud noises or direct contact were audible). - Solution: Software update from Sony requiring a reset.
- Reset Process: Press Bluetooth and middle button on the right side simultaneously until Bluetooth indicator blinks four times.
For further information consult the manual: