MRI machines are known to produce significant noise during operation. The loudness of an MRI scan can vary quite a bit, depending on the type of MRI and the specific sequences being used.
Decibel Levels of MRI Scanners
According to available information, MRI noises can range from 65 decibels to 130 decibels. It's important to note that these machines often produce noises that go above 90 to 100 decibels, necessitating the use of ear protection for patients. To put this into context, common loud noises like an alarm clock or vacuum cleaner measure around 70 decibels.
Why Are MRIs So Loud?
The noise produced by an MRI machine is due to the rapid switching of the magnetic field gradients, which causes the coils to vibrate. This vibration results in the distinct tapping, banging, or whirring sounds that patients hear during a scan.
Comparison to Common Sounds
Here's a quick comparison to understand the relative loudness of an MRI machine:
| Sound | Decibel Level |
|---|---|
| Alarm Clock/Vacuum Cleaner | 70 dB |
| MRI Machine (Low End) | 65 dB |
| MRI Machine (Typical) | 90-100 dB |
| MRI Machine (High End) | 130 dB |
Ear Protection During MRI Scans
Due to the high decibel levels, healthcare facilities always provide ear protection for patients undergoing MRI scans. This can include:
- Earplugs: These are inserted into the ear canal to block out sound.
- Headphones: Often, headphones are provided, which may also play music or sounds to further mask the noise.
Summary
In summary, MRI machines are capable of producing loud noises ranging from 65 to 130 decibels, often exceeding 90 to 100 decibels. Ear protection is therefore essential during an MRI scan to ensure patient comfort and to prevent potential hearing damage.
