In the presentation they say they expect to get 70db based on...

In the presentation they say they expect to get 70db based on the modelling but they need to prove that.

2020 – High Quality Sound
• Music playback – simplified structure.
• Demonstrated low frequencies (down to 100Hz) and sound quality.
• SPL <50dB @ 1m (SPL= Sound Pressure Level – “loudness”).
2021-Q1-2 – Improved Acoustic Performance
• 5dB SPL boost.
• Packaged chip plays out of the clean room.
• Multiple chips – 4 chips play together. 80 chips later this year.
2021-Q3-4 – Improved Acoustic Performance
• Optimization through simulation – currently SPL >70dB @ 1m (additional 10-15dB SPL)
• Product Fabrication later this year