Ed Gein's distinctive way of speaking as portrayed in the Netflix series "Monster: The Ed Gein Story" is largely a creative interpretation rather than a fully accurate representation of his real voice. Charlie Hunnam, who plays Gein, crafted the character's voice as an affectation inspired by Ed Gein's complicated relationship with his domineering mother. The high-pitched, soft, and childlike voice was meant to reflect his profound isolation, psychological issues, and his attempt to please his mother. It was not an authentic or natural voice for Gein, but rather a performance choice to make his inner world more audible and unsettling to viewers.
In reality, people who knew Ed Gein described his voice as quiet, soft, polite, and somewhat high-pitched but without the theatrical or strange accent given in the show. He was shy, socially awkward, and spoke in simple sentences with a calm, unremarkable tone. Some accounts even noted a somewhat feminine quality to his voice, possibly reflecting his psychological state and his mother's influence. There are no perfect recordings of his voice, which leaves much to interpretation. The difference between the real Ed Gein’s voice and the dramatized version underscores how Hollywood amplifies characteristics for effect in storytelling about notorious criminals.
In summary, Ed Gein's speech in popular media is deliberately stylized to highlight his psychological complexity and eerie nature, whereas the real Ed Gein spoke softly and plainly, without extreme vocal quirks.