Audiogram – A graphical representation of the results of a hearing test. Hearing Threshold – The softest sound that a person can hear at a specific frequency. Decibels (dB) – A unit of measurement for the intensity of sound. Frequency – The pitch of sound measured in Hertz (Hz). Pure Tone Audiometry – A hearing test that uses pure tones to measure hearing sensitivity. Air Conduction – The pathway of sound through the air to the outer ear and into the cochlea. Bone Conduction – The pathway of sound through the bones of the skull directly to the inner ear. Conductive Hearing Loss – A type of hearing loss caused by problems in the outer or middle ear. Sensorineural Hearing Loss – A type of hearing loss caused by damage to the inner ear or the auditory nerve. Mixed Hearing Loss – A combination of conductive and sensorineural hearing loss. Speech Audiometry – A test to assess how well a person can hear and understand speech. Otoscope – A tool used to examine the outer ear and ear canal. Tympanometry – A test to assess the middle ear's response to changes in air pressure. Threshold of Hearing – The lowest level of sound a person can hear. Hearing Sensitivity – The ability of the ear to detect sounds. Saturation Level – The highest intensity sound that can be heard, beyond which no further increase in perceived loudness occurs. Pure Tone Average (PTA) – The average of the hearing thresholds at 500, 1000, and 2000 Hz frequencies. Hearing Loss Classification – Refers to the degree of hearing loss (e.g., mild, moderate, severe, profound). Speech Reception Threshold (SRT) – The softest level at which speech can be understood 50% of the time. Audiometric Test – A diagnostic test used to evaluate hearing.