| Code | Commercial Product Name | Manufacturer |
| EWO | [ ] | HTI, INC. |
| EWO | [ ] | DIGITAL HEARING SYSTEMS CORPORATION |
| EWO | [ ] | VIRTUAL CORP. |
| EWO | [ ] | CONTROL-X, INC. |
| EWO | ["EB AUDIOMETER" AND AUDIOMETERS ] | ECKSTEIN BROS., INC. |
| EWO | [ACOUSTIC APPRAISER, WIDE RANGE, AUDITORY SCREENER ] | QUALITONE, INC. |
| EWO | [AMBCO AUTOMATIC W/WO PRINTERS ] | AMBCO ELECTRONICS, A CALIFORNIA CORP. |
| EWO | [AMPLAID & MAB 100 MICROCOMPUTER AUDIOMETER ] | AND-OR CORP |
| EWO | [AUDIO SCOUT, BELTONE MODEL 2000 ] | BELTONE ELECTRONICS CORP. |
| EWO | [AUDIOMETER ] | GRASON-STADLER/ NICOLE BIOMEDICAL/ THERMO ELECTRON CORP. |
| EWO | [AUDIOMETER ] | MAICO HEARING INSTRUMENTS, INC. |
| EWO | [MULTIPLE ] | BERNAFON-MAICO, INC. |
| EWO | [AUDIOMETER, REXTON ] | ARGOSY INTERNATIONAL INC. |
| EWO | [AUDIOTONE AUDIOMETER ] | AUDIOTONE DIV. ROYAL INDUSTRIES |
| EWO | [AUTOMATIC RECORDING AUDIOMETER ] | B&K INSTRUMENTS, INC. |
| EWO | [CCA100 ] | BENSON MEDICAL INSTRUMENTS COMPANY |
| EWO | [CRIB-O-GRAM, MODEL G2A ] | TELESENSORY CORP. |
| EWO | [DEMLAR COMPUTERIZED AUDIOMETER ] | DEMLAR MEDICAL, INC. |
| EWO | [DEMLAR SWEEP FREQUENCY AUDIOMETERS ] | MONITOR INSTRUMENTS, INC. |
| EWO | [EARSCAN AUDIOMETER ] | MICRO AUDIOMETRICS CORP. |
| EWO | [INFANTOMETER ] | CHELCO ELECTRONICS, INC. |
| EWO | [INTERACOUSTICS/MEDI ] | INTERACOUSTICS AS |
| EWO | [IPSIPHONE ] | POSITRON INDUSTRIES INC. |
| EWO | [IVRA-INTELLIGENT VISUAL REINFORCEMENT AUDIOMETRY ] | INTELLIGENT HEARING SYSTEMS |
| EWO | [MADSEN IMMITTANCE AUDIOMETER MODEL Z0174, AURICAL, and MICRO-5 ] | MADSEN ELECTRONICS /GN Resound/ GN Great Nordic A/S |
| EWO | [MD-1 & MD-1P, MD-3, MD-4, 4P ] | SINGER MEDICAL PRODUCTS, INC. |
| EWO | [MIDIMATE 602 DIAGNOSTIC AUDIOMETER ] | |
| EWO | [MULTIPLE ] | QUALITONE |
| EWO | [MULTIPLE ] | MIMOSA ACOUSTICS, INC. |
| EWO | [NAGASHIMA MT-3 AUDIOMETER ] | NAGASHIMA MEDICAL INSTRUMENTS CO., LTD. |
| EWO | [PORTABLE AUDIOMETER, MODEL TA-10 ] | AVIONICS SPECIALTIES, INC. |
| EWO | [PRODIGIT 2000 ] | DECIBEL INSTRUMENTS, INC. |
| EWO | [PROGRAM III ] | TRACOUSTICS, INC. |
| EWO | [QUAILTONE SCI 18 ] | STARKEY LABS, INC. |
| EWO | [RANGER, SCOUT, SCOUT SPORT, EMAV ] | BIO-LOGIC SYSTEMS CORP. |
| EWO | [RASTRONICS RE-2000, CCI-8, CCI-10/3, PORTAREM-20 ] | |
| EWO | [RION DIAGNOSTIC AUDIOMETER ] | RION CO. LTD. |
| EWO | [SCHAFER CORTICAL HEARING INSTRUMENT DIAGNOSTIC MODEL D-1 ] | ELECTRO-PHYSICAL RESEARCH, INCORPORATED |
| EWO | [SIBELMED AUDIOMETER AC-50D ] | SIBEL ELECTROMEDICANA S.A. |
| EWO | [SOUND FIELD AUDIOMETER ] | NU-EAR ELECTRONICS |
| EWO | [MARK III & MODEL 88 ] | TELEX COMMUNICATIONS, INC. |
| EWO | [Multiple AUDIOMETERS ] | TRACOR, INC. AUSTIN INSTRUMENTS DIV. |
| EWO | [TREMETRICS - VARIOUS MODELS ] | TREMETRICS, INC. |
| EWO | [TYMPANOMETER (REGISTERED TRADEMARK) ] | AMERICAN ELECTROMEDICS CORP. |
| EWO | [ZODIAC 901 ] | |