After check in technic by K.Yanavarut, we found that it is in good condition.
2. Teach K.Anurat how to adjust the sound of a hearing aid, if fitting it will no screaming.
3. Inform him to wearing a hearing aid all the time on today onwards.
4. OPD fund is keep the same 17KB/Year because no need to buy a new hearing aid.
5. HR can go to test drive with him within this week. Please advise your availability.