A measure of acoustic noise generated from transcranial magnetic stimulation coils.

Abstract:

:The intensity of sound emanating from the discharge of magnetic coils used in repetitive transcranial magnetic stimulation (rTMS) can potentially cause acoustic trauma. Per Occupational Safety and Health Administration (OSHA) standards for safety of noise exposure, hearing protection is recommended beyond restricted levels of noise and time limits. We measured the sound pressure levels (SPLs) from four rTMS coils with the goal of assessing if the acoustic artifact levels are of sufficient amplitude to warrant protection from acoustic trauma per OSHA standards. We studied the SPLs at two frequencies (5 and 10 Hz), three machine outputs (MO) (60, 80 and 100%), and two distances from the coil (5 and 10 cm). We found that the SPLs were louder at closer proximity from the coil and directly dependent on the MO. We also found that in all studied conditions, SPLs were lower than the OSHA permissible thresholds for short (<15 min) acoustic exposure, but at extremes of use, may generate sufficient noise to warrant ear protection with prolonged (>8 h) exposure.

journal_name

Brain Stimul

journal_title

Brain stimulation

authors

Dhamne SC,Kothare RS,Yu C,Hsieh TH,Anastasio EM,Oberman L,Pascual-Leone A,Rotenberg A

doi

10.1016/j.brs.2014.01.056

subject

Has Abstract

pub_date

2014-05-01 00:00:00

pages

432-4

issue

3

eissn

1935-861X

issn

1876-4754

pii

S1935-861X(14)00059-X

journal_volume

7

pub_type

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