ᴛᴏ ᴄᴏɴᴅᴜᴄᴛ ʜɪɢʜ-sᴇɴsɪᴛɪᴠɪᴛʏ ᴍᴇᴛᴇʀ-ᴡᴀᴠᴇʟᴇɴɢᴛʜ ᴏʙsᴇʀᴠᴀᴛɪᴏɴs, ᴡʜɪᴄʜ ᴀʀᴇ ᴅɪғғɪᴄᴜʟᴛ ᴛᴏ ᴘᴇʀғᴏʀᴍ ғʀᴏᴍ ᴇᴀʀᴛʜ ᴅᴜᴇ ᴛᴏ ɪᴏɴᴏsᴘʜᴇʀɪᴄ ɪɴᴛᴇʀғᴇʀᴇɴᴄᴇ.