The Sensory Science of Reiki: How Sound and Scent Shape the Client’s Experience

Does what a client hears or smells during a session truly affect their Reiki experience? The answer may lie in the emerging field of "Dream Hacking."

In the February 2026 edition of New Scientist, writer Julie Peck explores how researchers are beginning to influence the sleeping mind. Peck explains that "neuroscientists and psychologists are increasingly using sounds, touch, movement, and particularly smells to influence the content of people’s dreams."

A key focus of this research is Targeted Memory Reactivation (TMR). In one study, neuroscientists paired specific sounds with a puzzle-solving task. By playing those same sounds while the subjects slept, they were able to coax the brain into continuing to work on the problems. As the article notes, this process "seems to trick the hippocampus, a brain region important for memory, by evoking what looks like a spontaneous reactivation of memory."

The Hypnagogic State

So how does this link into Reiki? While our clients are in their relaxed state, they are not always fully asleep,  they are often in a hypnagogic state, that in between space of being awake and drifting off. In this state, real world sounds can convert into internal imagery. A bird chirping outside might translate in their half sleep as a toy whistle.

Creating the Space

This means the environment of our Reiki rooms really matters. It isn't just about ambiance, it’s about the neurological signals we are sending.

• Sound: Our music choices will have an impact. Just as TMR uses sound to trigger memory reactivation in the hippocampus, the audio in a Reiki room can influence the thoughts and images the mind creates.

• Scent: The smells we choose, such as scented candles or aromatherapy, are equally influential. Because scent is processed by the hippocampus, the same brain region important for memory, it can directly impact the content of a client's session by triggering specific mental images or spontaneous memories while they are in a relaxed state.

The Responsibility of the Practitioner

If, as Julie Peck suggests, the brain can be influenced through sensory input, then every detail of a Reiki room is a tool. By providing a quiet, intentional space, we ensure the client's brain isn't busy processing outside distractions. This allows the sensory environment to support the session, helping the client remain focused on their own internal experience while they rest.

© 2026 Laura Noonan Reiki. All rights reserved. No part of this publication may be reproduced or transmitted for commercial purposes without prior written permission. Attribution is required for all shared insights.