Diagnostic Evaluation

Diagnostic Audiology is not just a Basic 15-minute Hearing Screening

Not all hearing tests are the same. Many retail locations offer basic hearing screenings designed primarily to sell hearing aids. At Doctors of Hearing, we provide comprehensive diagnostic evaluations performed by licensed audiologists to fully understand your hearing health.

The following advanced tests allow our audiologists to determine:

✔ The type and degree of hearing loss

✔ Whether hearing loss may have a medical cause

✔ If a medical referral is needed

✔ The most effective treatment options

Why This Matters

Hearing loss can sometimes be related to medical or neurological conditions. A comprehensive evaluation ensures that important health concerns are not overlooked and that treatment recommendations are accurate, ethical, and personalized.

At Doctors of Hearing, our goal is not simply to sell hearing aids—it is to provide the highest level of diagnostic hearing care and long-term hearing health support.

Comprehensive Hearing Evaluation

This evaluation includes a series of tests that measure your hearing sensitivity, how well you understand speech in quiet and noisy environments, and how well your middle and inner ear are functioning. We also perform a visual examination of the ear and review your medical history to determine if a medical referral may be necessary.

Extensive Patient Case History:

• Prior to testing, the audiologist will collect a detailed case history about the patient. This information helps the audiologist understand possible causes of hearing loss and guides the selection and interpretation of test procedures as well as support additional recommendations for follow-up with other specialists.

• Asking questions regarding hearing concerns

• Inquiring about communication concerns including

• Asking further questions regarding other ear symptoms

• Inquiring about additional medical history including.

Hearing Handicap Inventory for the Elderly (HHIE)

• Assesses the perceived social and emotional impact of hearing loss in older adults

• Uses a self-report questionnaire with 25 questions asking how hearing difficulties affect communication, relationships, and emotional well-being.

• Identifies the degree of perceived hearing handicap, helping audiologists with screening, counseling, and measuring treatment outcomes.

Otoscopic Evaluation:

• Assess the anatomy and structures of the ear canal

• Identify any abnormalities, such as growths, lesions, or tumors

• Examine the tympanic membrane (eardrum) for color, translucency, and position (e.g., retracted, bulging, or normal)

• Detect the presence of cerumen (earwax), fluid, or other foreign material.

It is crucial that the ears are cleared of excessive wax. Otherwise, this can interfere with accurate test results.

WE DO NOT TEST IF EAR CANALS HAVE EXCESSIVE WAX OR THE EAR CANAL IS OCCLUDED WITH WAX.

Tympanometric Testing:

• An objective test assessment of middle ear function and tympanic membrane (eardrum) mobility

• Performed by varying air pressure in the ear canal to measure eardrum response

• Helps evaluate common middle ear concerns such as muffled hearing, tinnitus, ear pressure/fullness, or “popping” sensations

• Abnormal results may indicate the need for medical referral or intervention

• Certain findings can assist in identifying conductive or mixed hearing loss

Acoustic Reflex Testing (Ipsilateral & Contralateral):

• Assesses the function of the middle ear, cochlea, auditory nerve, and brainstem pathways by measuring reflexive contractions of the middle ear muscles in response to sound

• Evaluates the auditory system for potential abnormalities affecting hearing sensitivity or nerve function

• Detects patterns that may help differentiate between sensorineural, conductive, or retrocochlear hearing issues.

Otoacoustic Emissions (OAE) Testing:

• Assesses outer hair cell function in the cochlea by measuring sounds the inner ear produces in response to auditory stimuli.

• Can provide an objective measure of cochlear health in individuals who cannot actively respond to sounds (infants, young children, or certain adults)

• Support diagnostic decisions by helping differentiate between cochlear and retrocochlear hearing problems (e.g., auditory neuropathy, hidden hearing loss, etc.)

Pure Tone Threshold Testing – Air Conduction

• Assesses hearing sensitivity in each ear individually using headphones or inserts

• Determines the softest sounds a person can hear from low to high pitches

• Identifies the degree and configuration of hearing loss (mild, moderate, moderately, severe, severe, or profound)

Pure Tone Threshold Testing – Bone Conduction

• Assesses cochlear (inner ear) hearing sensitivity directly, bypassing the outer and middle ear

• Determines the softest sounds a person can hear from low to high pitches using a bone oscillator placed on the mastoid

• Determines the type of hearing loss (sensorineural, conductive, or mixed) by comparing bone conduction thresholds to air conduction thresholds

• Provides diagnostic information to guide medical or audiologic recommendations

Tone Decay Testing:

• Assesses the ear’s ability to sustain hearing a continuous tone, also referred to as auditory fatigue

• Identifies potential retrocochlear abnormalities, which may indicate issues with the auditory nerve (cranial nerve VIII) or the cerebellopontine angle

• Helps differentiate between cochlear and retrocochlear hearing issues to guide further evaluation or referral

Speech Discrimination Testing:

• Measures the patient’s ability to correctly identify spoken words presented at a comfortable listening level above the hearing threshold

• Provides a percentage score representing how well the patient understands speech in quiet listening conditions

• Sets realistic expectations for hearing aid use, helping patients understand how they may perceive speech with amplification

• Highlights the importance of timely intervention, as delaying hearing aid fitting may reduce future speech understanding

• Supports treatment planning, including hearing aid selection, programming, and auditory rehabilitation strategies

QuickSIN (Speech-in-Noise) Testing

• Assesses the patient’s ability to understand speech in background noise, simulating real-world listening environments

• Sets realistic expectations for communication in noisy environments, guiding counseling and auditory rehabilitation

Most Comfortable Level (MCL) Testing

• Identifies the sound level a patient finds comfortably loud for sustained listening

• Helps guide hearing aid programming and speech testing

• Assesses a patient’s dynamic hearing range by presenting speech or tones while adjusting the intensity up or down in small steps while the patient indicates when the sound feels the most comfortable

Uncomfortable Loudness Level (UCL) Testing

• Identifies sound levels that a patient finds uncomfortably loud

• Helps define a patient’s upper loudness limit to prevent over-amplification

• Assesses a patient’s dynamic hearing range by gradually increasing the intensity of sounds from a comfortable level until the patient signals that the sound has become uncomfortable, before it is painful.

Tinnitus Evaluation

Pitch Matching

• Identifies the pitch (frequency) of the patient’s tinnitus

• The patient listens to tones and selects the closest match

• Results help guide management and sound therapy options

Tinnitus Masking

• Assesses how external sounds affect tinnitus perception

• Narrow band noise is presented at different levels

• Helps determine if sound can reduce or mask the tinnitus

• Findings support treatment recommendations (e.g., sound therapy, hearing aids)

When Should You Schedule

a Comprehensive Hearing Evaluation?

Hearing loss often develops gradually, making it difficult to recognize at first. Many patients do not realize how much they are missing until their hearing is evaluated.

Common signs include:

• Difficulty following conversations in groups

• Trouble hearing in restaurants or crowded environments

• Frequently misunderstanding words

• Avoiding social situations because listening feels exhausting

• Feeling that others speak too softly

• Needing captions when watching television

• Ringing or buzzing in the ears

Addressing hearing concerns early can help prevent communication difficulties, listening fatigue, and social withdrawal.

What Makes Doctors of Hearing Different?

At Doctors of Hearing, we believe hearing care should be thorough, ethical, and patient-centered.

Licensed Audiologists Only: You will always be seen by a licensed audiologist or hearing doctor, never by sales staff or technicians.

Advanced Diagnostic Testing

We provide comprehensive evaluations using state-of-the-art diagnostic equipment to accurately assess hearing, tinnitus, and balance disorders.

Unbiased Hearing Aid Recommendations

We work with the leading hearing aid manufacturers and are not limited to a single brand. This allows us to recommend the best technology for each patient’s needs.

Ethical, Evidence-Based Care

Our team follows professional best practices and clinical guidelines to ensure safe, accurate, and effective treatment.

Personalized Treatment Plans

Every patient is unique. We take the time to understand your hearing needs, lifestyle, and communication goals before recommending solutions.

Schedule Your Comprehensive Hearing Evaluation

If you are experiencing hearing concerns, tinnitus, or balance problems, our audiologists are here to help.

Contact Doctors of Hearing today to schedule your comprehensive evaluation and take the first step toward better hearing.

Try our

Online Hearing Screening

Discover personalized hearing solutions designed to enhance your daily life. Our expert team offers innovative care tailored to meet your unique hearing needs.

Hearing Check

Hearing Handicap Inventory for the Elderly (HHIE)

Assesses the perceived social & emotional impact of hearing loss in older adults

Uses a self-report questionnaire with 25 questions asking how hearing difficulties affect communication, relationships, and emotional well-being.

Identifies the degree of perceived hearing handicap, helping audiologists with screening, counseling, and measuring treatment outcomes.

Otoscopic Evaluation:

Assess the anatomy and structures of the ear canal

Identify any abnormalities, such as growths, lesions, or tumors

Examine the tympanic membrane (eardrum) for color, translucency, and position (e.g., retracted, bulging, or normal)

Detect the presence of cerumen (earwax), fluid, or other foreign material

It is crucial that the ears are cleared of excessive wax. Otherwise, this can interfere with accurate test results.

WE DO NOT TEST IF EAR CANALS HAVE EXCESSIVE WAX OR THE EAR CANAL IS OCCLUDED WITH WAX. Audiologist are not able to bill for this service.

Tympanometric Testing:

An objective test assessment of middle ear function and tympanic membrane (eardrum) mobility

Performed by varying air pressure in the ear canal to measure eardrum response

Helps evaluate common middle ear concerns such as muffled hearing, tinnitus, ear pressure/fullness, or “popping” sensations

Abnormal results may indicate the need for medical referral or intervention

Certain findings can assist in identifying conductive or mixed hearing loss

Acoustic Reflex Testing (Ipsilateral & Contralateral):

Assesses the function of the middle ear, cochlea, auditory nerve, and brainstem pathways by measuring reflexive contractions of the middle ear muscles in response to sound

Evaluates the auditory system for potential abnormalities affecting hearing sensitivity or nerve function

Detects patterns that may help differentiate between sensorineural, conductive, or retrocochlear hearing issues.

Otoacoustic Emissions (OAE) Testing:

Assesses outer hair cell function in the cochlea by measuring sounds the inner ear produces in response to auditory stimuli

Can provide an objective measure of cochlear health in individuals who cannot actively respond to sounds (infants, young children, or certain adults)

Support diagnostic decisions by helping differentiate between cochlear and retrocochlear hearing problems (e.g., auditory neuropathy, hidden hearing loss, etc.)

Pure Tone Threshold Testing – Air Conduction

Assesses hearing sensitivity in each ear individually using headphones or inserts

Determines the softest sounds a person can hear from low to high pitches

Identifies the degree and configuration of hearing loss (mild, moderate, moderately, severe, severe, or profound)

Pure Tone Threshold Testing – Bone Conduction

Assesses cochlear (inner ear) hearing sensitivity directly, bypassing the outer and middle ear

Determines the softest sounds a person can hear from low to high pitches using a bone oscillator placed on the mastoid

Determines the type of hearing loss (sensorineural, conductive, or mixed) by comparing bone conduction thresholds to air conduction thresholds

Provides diagnostic information to guide medical or audiologic recommendations

Tone Decay Testing:

Assesses the ear’s ability to sustain hearing a continuous tone, also referred to as auditory fatigue

Identifies potential retrocochlear abnormalities, which may indicate issues with the auditory nerve (cranial nerve VIII) or the cerebellopontine angle

Helps differentiate between cochlear and retrocochlear hearing issues to guide further

Speech Discrimination Testing:


Measures the patient’s ability to correctly identify spoken words presented at a comfortable listening level above the hearing threshold.


Provides a percentage score representing how well the patient understands speech in quiet listening conditions.

Our testing:

Sets realistic expectations for hearing aid use, helping patients understand how they may perceive speech with amplification

Highlights the importance of timely intervention, as delaying hearing aid fitting may reduce future speech understanding.

Supports treatment planning, including hearing aid selection, programming, and auditory rehabilitation strategies

QuickSIN (Speech-in-Noise) Testing

Assesses the patient’s ability to understand speech in background noise, simulating real-world listening environments

Sets realistic expectations for communication in noisy environments, guiding counseling and auditory rehabilitation

Most Comfortable Level (MCL) Testing

Identifies the sound level a patient finds comfortably loud for sustained listening

Helps guide hearing aid programming and speech testing.

Assesses a patient’s dynamic hearing range by presenting speech or tones while adjusting the intensity up or down in small steps while the patient indicates when the sound feels the most comfortable.

Uncomfortable Loudness Level (UCL) Testing

Identifies sound levels that a patient finds uncomfortably loud

Helps define a patient’s upper loudness limit to prevent over-amplification

Assesses a patient’s dynamic hearing range by gradually increasing the intensity of sounds from a comfortable level until the patient signals that the sound has become uncomfortable, before it is painful

Tinnitus Evaluation

Pitch Matching

Identifies the pitch (frequency) of the patient’s tinnitus

The patient listens to tones and selects the closest match

Results help guide management and sound therapy options

Tinnitus Masking

Assesses how external sounds affect tinnitus perception

Narrow band noise is presented at different levels

Helps determine if sound can reduce or mask the tinnitus

Findings support treatment recommendations (e.g., sound therapy, hearing aids)

Videonystagmography (VNG): Involves the use of infrared goggles to track eye movements during visual stimulation and positional changes. VNG can determine whether dizziness is caused by inner ear disease as opposed to a central nervous system pathology.

When a patient comes to an Audiologist office, our main concern is: is there anything medical going on in the ears that can be medically treated prior to use of hearing aids? Yes, we want to help people hear better and hence the recommendation of hearing aids but we are also concern about the medical aspect of our patients.

We offer all of the above tests in our Pasadena office and in our Rancho Cucamonga office as well but we also offer ABR and Vestibular testing in our Rancho Cucamonga office. If a patient needs an ABR or vestibular testing, they can visit our Rancho Office.

Our Purpose

Doctors of Hearing, Inc. is dedicated to improving the quality of life of the hearing-impaired community. Doctors of Hearing, Inc. is your trusted source for the information needed to make informed decisions on hearing aid purchases. Doctors of Hearing, Inc., provides expert testing and proper fitting of hearing aids at a reasonable price.

Company Details

Doctors of Hearing, Inc. is a family-owned audiology practice serving patients through its offices in Pasadena, Rancho Cucamonga, and San Dimas, California. Dr. Norma Camacho, Au.D., CCC-A, ABA, is a licensed dispensing audiologist who is board certified by the American Board of Audiology and holds the ASHA Certificate of Clinical Competence, a nationally recognized credential. She is also a member of the Academy of Doctors of Audiology.

Phone numbers: 

626 639-3182  Pasadena Office
909 481-2834
Rancho Cucamonga Office
626 250-6642
San Dimas