“historically, the Canon of the Mass has been celebrated silently…”

But, could somebody explain why this is? Shouldn’t the laity hear these prayers?.
1. The Silence of the Canon The entire Canon of the Mass is devoid of any vocal sounds, other than one phrase “Nobis quoque peccatoribus” where the priest strikes his breast, emphasizing his own sinfulness and unworthiness of celebrating such an unspeakably divine action. The only other sound is when the bell is rung, initially at the “Hanc igitur” as a warning bell to inform the faithful of the impending consecration, and then three times at each consecration: when the priest genuflects before the divine oblation, when he raises the divine victim in an elevation of worship and adoration, and finally when he genuflects again. Otherwise, complete silence.
Why this silence, when the canon is the most important part of the Mass?
Simply because of that fact. The canon of the Mass joins the earthy sphere to the heavenly sphere. Christ’s sacrifice was performed once and for all; it can never be repeated as it was the eternal and perfect sacrifice to end all sacrifices. However, since the victim and the priest was God, the person of our Lord Jesus Christ, the effects are infinite: the entire human race was redeemed wherever they lived, regardless of time or space. But an important fact is that the act that Christ performed was placed within His creation, and at a particular point in time. Therefore, for the sacrifice of the cross to become effective universally over all time, it needed to be perpetuated through the ages by a priesthood acting in the person of our Lord and presenting His sacrifice anew to a new generation. This is why Christ built His Church: to bring forth the graces of the incarnation, to prolong it and “make present” its effects to all people. The sacrifice of the cross, and the consecration in the Mass, are timeless entities in a temporal world.
The silence, therefore, enables us to transcend our present existence and become present at the foot of the cross itself. Our senses, so active in the outside world, are suppressed so that our soul can touch the divine presence of God on the altar, so that we may be lifted up with the oblation to the altar of God Himself in heaven, surrounded by all the Hosts and angels in constant prayer and adoration. We, in effect, dip our toes into the pool of eternity, no longer limited by our earthly existence in time and space, but instead become one with our Lord in offering ourselves to God the Father in the one perfect act of self-giving, love and adoration.
Our senses are not totally silenced though. Through our eyes, we see the Holy Victim raises up to the Father in the form of bread and wine; closing our eyes we see the cross above us and the angelic party beyond. In our ears, we hear the ringing of bells, confirming what we see and what we feel in our hearts. In our nostrils, we smell the sweet odor of incense, floating up to heaven accompanying the Victim to the altar of God. It is truly an entire experience of Body and Soul where the carpet of life is swept from underneath us revealing the eternal reality of the cross and the truth of God’s love for each and everyone of us.
Using vocal words in the canon would defy this divine reality, it would seemingly bring the events down to a level of speech and thought, rather than action and sacrifice. We must feel with our heart and soul the event taking place, not hear with our ears the words which enact the event. Only silence can penetrate this mystery, with our spirit lifting us above that temporal actions of the priest into the divine and eternal reality of the High Priest: our Lord on the Cross.
latin-mass-society.org/beaut.htm