| 381 / | HD | ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES |
| 150 | DF | ELECTRO-ACOUSTIC AUDIO TRANSDUCER {18} |
| 355 | DF | .~ Housed microphone {4} |
| 361 | ![]() | .~.~ Mounting or support {7} |
| 362 | DF | .~.~.~> Boom (other than on headset) |
| 363 | DF | .~.~.~> Stand or gooseneck |
| 364 | DF | .~.~.~> On body or clothing |
| 365 | DF | .~.~.~> In electronic apparatus or vehicle |
| 366 | DF | .~.~.~> Detachable from support |
| 367 | DF | .~.~.~> In headgear |
| 368 | DF | .~.~.~> On shock absorbing support |