Figure 3-2: Ceiling void protection

Figure 3-2: Ceiling void protection details - Left: Mass barrier. Right: insulation.3.2 PRIVACYFollowing discussions with the architects, it is understood that the client requires flexibility and privacy between the Guest Lounge and the Lobby (as highlighted in Figure 3-3) and had accepted an RW 48 dB operable wall between this rooms which we expect an onsite performance of approximately Dntw 35. Figure 3-3: Assessment of room adjacency for privacy191018-5-ME090-AMO-AC03 Rev.1 - MFAT CMB - Acoustics Design Note | Page 83.3 GUEST LOUNGE TO THE KITCHEN AND CONFERENCE ROOMShould a high speech security performance be required between the guest lounge and the kitchen in addition to the guest lounge and the conference room, the mullions and the walls sound insulation performance will require further assessment and acoustic detailing (as highlighted in Figure 3-4).Figure 3-4:Mullions to be considered for sound insulation purposes3.4 MECHANICAL SERVICES AND SOUND MASKING NOISEThe mechanical services are being designed to target ambient noise levels which both achieve the CBS internal ambient noise level requirements and provides benefits to the privacy rating between adjacencies. Sound masking noise is recommended to increase and maintain the privacy rating where mechanical services may fluctuate.