Masked with headphones vs Ultrasonic with speakers

[Shannon]

All of my programs since 2G use the build methodology that requires headphones to get the most from. There's always a trade-off not using headphones. But it's better to get exposure without headphones, than exposure through a mono speaker, and better through a mono speaker than not at all. The trade off does become more significant as the complexity increases, so there will be a bigger impact that you can notice from using a 5G with headphones than a 4G, and more from 4G than 3G.