Statements (13)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:Acoustic
|
| gptkbp:design |
funnel-shaped
|
| gptkbp:function |
collect sound waves
|
| https://www.w3.org/2000/01/rdf-schema#label |
ear trumpet
|
| gptkbp:invention |
17th century
|
| gptkbp:is_popular_in |
gptkb:19th_century
|
| gptkbp:made_of |
gptkb:metal
gptkb:plastic gptkb:wood |
| gptkbp:replaced_by |
gptkb:Acoustic
|
| gptkbp:used_for |
hearing assistance
|
| gptkbp:bfsParent |
gptkb:Bell's_telephone
|
| gptkbp:bfsLayer |
4
|