·         Arousal

·         The Brain

·         Exercise

·         Indoor Air Pollution

·         Muscle Tension

·         Nutrition

·         Posture

·         Sensory Processing

·         Sleep

·         Other Suggestions


Research Topics


My Theories

Former Theories



The Cause of Internet and TV Addiction?


Sound Sensitivity


·         Introduction

·         Hyperacusis

·         Hyperacute Hearing

·         Phonophobia

·         Recruitment



"There are four different conditions that all can have similar characteristics--normal sounds are TOO LOUD to stand. Sometimes it can be difficult to tell these conditions apart, namely: 1.  hyperacute hearing,  2.  hyperacusis,  3. recruitment and  4. phonophobia."



"…Individuals who have collapsed tolerance to sound. This unique international community consists of individuals with hyperacusis, recruitment, hyperacute hearing, Meniere's disease, and even autistic children."

Hyperacusis Network: Supplement



·        Hearing: Sound Sensitivity: Hyperacusis


Hyperacute Hearing

"These individuals represent a larger group of sound sensitive individuals in the world. To the best of our knowledge, they are usually born sound sensitive and do not have tinnitus. This group shares two similarities to people with hyperacusis: they usually have no hearing loss; and share the ability, like hyperacusis patients, to produce an audiogram showing hearing sensitivity at negative decibel levels."

Hyperacusis Network: Supplement


"This is a rare condition where a person can hear certain sounds at a much softer volume than a person with normal hearing. Therefore, if these sounds are even of moderate loudness, they can seem very loud if you have hyperacute hearing at that frequency."





"This is a mental condition where people become or are afraid of certain sounds that they associate with "bad things". As a result, they perceive these sounds as much louder than they really are."




·         Sensory Processing: Neurodevelopmental Delays: Interhemispheric Integration

·         Research Topics: Eye Movement Desensitization and Reprocessing (EMDR)

·         Sensory Processing: Neurodevelopmental Delays: Laterality



"This, I believe, is the largest group of sound sensitive people in the world. In lay terms, recruitment is similar to having hyperacusis, but with the added feature of hearing loss. Usually this group consists of individuals over 40 years of age that have the classic high frequency hearing loss evident on their nose diving audiogram."

Hyperacusis Network: Supplement


This condition is ALWAYS a by-product of a sensorineural hearing loss. (If you don't have a hearing loss, you can't have recruitment.) A person with recruitment perceives volume increases much faster than the actual volume increase. As a result, sounds rapidly become too loud to stand. A hard of hearing person may have both recruitment and hyperacusis at the same time.



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