How much effort have you put into looking for the source of the sound?
Please list any scientific or technical training you have.
What year did you start hearing the hum?
Are you still hearing it today?
In which ear is it loudest?
Does the sound tend to start at a certain time of day? Explain.
Does the sound ever stop? Please tell us about this.:
(OPTIONAL TECHNICAL QUESTION) If you answered the previous question, if you kept the tone
generator volume low enough and used high quality speakers or one headphone, did you notice
any "beating" or pulsing as the tones got close? This is the same type of thing you hear
when you tune a guitar by playing two strings at once. Please explain.
Please list symptoms, if any, caused by the sound (check all that apply)
If you shake your head very briefly, or exhale loudly, does the noise stop for about half a
second and then quickly return?
Where is it the loudest?:
When is the sound the loudest?
Which is your dominant hand?
Have other people heard the same sound at the same time and in the same place as you?
Will sounds like a bathroom fan or other background sounds mask the humming noise?
Medical issues with your hearing:
Are you, or have you been in the past a regular user of Advil (Ibuprofen), Tylenol
(Acetaminophen), or Aspirin (ASA)?
Which of the following medications were you taking before the Hum appeared?
Have any of the following conditions been diagnosed or suspected in your parents, you, or
siblings? Check all that apply. This information might be helpful, but of course this
question is completely optional.
Have you ever been diagnosed with vertigo or balance problems?
You would describe yourself as...
Please try to recall what antibiotics you took during the time the Hum appeared, and after.
Do you prefer low-calorie softdrinks or regular ones? Please estimate your consumption, in
330ml/11 fl.oz cans permonth.
Would you consider yourself sensitive to sounds in general?
You live in ..
Does the sound change at all with the weather? Explain.
Does the sound change at all with the seasons?
Have you noticed any changes in the sound after air travel or being in the mountains? Please
Other cities you've heard it in:
Have you ever worked in loud environments such as construction, heavy industry, music
performance and recording, and so on? Please explain.