4 Acoustic Room Specifications
The acoustic room is a layer used to help contain the noise (within the Magnet Room) which is
produces during clinical scanning. The following information is provided for the acoustic
engineer to design for acoustic noise containment within the Magnet room.
Table 3-2: Acoustic Specifications
Maximum Sound Pressure Level
1
Frequency Range
Magnet Bore Isocenter 127 dBA
See Illustration 3-3
Front of Magnet - 800 mm from bore measurement 120 dBA
Notes:
1. Maximum Sound Pressure Levels is defined as the maximum allowable level any MR scanner can produce while protecting
the patient to the IEC 60601-2-33 code.
2. The total energy, SPL, is derived through the log sum of each 1/3 band octave totaling the 127 dBA. That is, the maximum
single 1/3 band is lower than the published values at both the isocenter and at the front of the magnet
Illustration 3-3: Sound Pressure Spectral Distribution (1/3 Band Relative SPL)
NOTE: The MR product clinical operation will generate sound pressure proportional to the
specific clinical application. The entire spectra (envelope) shown above (Illustration
3-3) represents the relative 1/3 band octave sound pressure the MR scanner may
transmit into the air. The acoustic room will best suit the customer when the 127 dBA
proportionally distributed as defined by the Illustration
Refer to Acoustic Background and Design Guidelines for acoustic design information.
SIGNA Voyager Pre-Installation
Direction 5680008–1EN, Revision 2
Chapter 3 Magnet Room 65
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