Some data points to ponder.
The Amstrong insulation will definitely help deaden the sound of people walking on tile.
Use black ground cover (used in planting beds) stapled to joists. Then cover that with wood lattice painted to a color of your choice. Another option it to use plastic corrogated sheets (used for shead roofs) but spray the hidden side with undercoating spray to help deaden the plasic resolution.
Carpet may sound like an appealing idea but it would be very difficult to get it to look right on the ceiling due to weight vs gravity and trying to stretch and attach it properly.
The Amstrong insulation will definitely help deaden the sound of people walking on tile.
Use black ground cover (used in planting beds) stapled to joists. Then cover that with wood lattice painted to a color of your choice. Another option it to use plastic corrogated sheets (used for shead roofs) but spray the hidden side with undercoating spray to help deaden the plasic resolution.
Carpet may sound like an appealing idea but it would be very difficult to get it to look right on the ceiling due to weight vs gravity and trying to stretch and attach it properly.