Mudah dan Aktif Belajar Fisika untuk Kelas XII
54
4. Batas Pendengaran
?52D6?DED6=296?86D29E:329G22?EC:252?96G2?5:=6?82A: 56?82? 2=2D A6?56?82B2? H2?8 C6AEB?2 2E? 62AE2?
A6?56?82B2??H236B365236522D2C62AE2?A6?56?82B2?5:EEB 36B52C2B2?7B6E6?C:3E?H:
2?EC:2?B2=6:=::32D2CA6?56?82B2?2?D2B2
96BDIC2A2: 56?82?
96BDI26B297B6E6?C:D6BC63ED5:?222?
C652?82?526B297B6E6?C:5:32G29
96BDI5:C63ED 52?526B295:2D2C7B6E6?C:56?82B2D2E5:2D2C
96BDI5:C63ED
636B2A296G2?2AE6?56?82B3E?H:E=DB2C?:3292?96G2? C6A6BD: 6=6=2G2B H2?8 6:=:: 2=2D A6?8=:92D2? D:52 C632: 2=2D
A6?56?82B2??H2 6?88E?22? 3E?H: E=DB2C?: E?DE 6?86D29E: 36?52H2?82525:56A2??H2
5. Pemanfaatan Gelombang Bunyi
6=32?83E?H:32?H25:2?722D2?52=269:5EA2?C692B:92B: :C2=?H2E?DE6?6?DE2?652=22?=2ED6?42B:CE36B:?H252?
6?56D6C:6BEC22?=82,?DE6?6?DE2?652=22?=2ED2=2D A6?56D6C:H2?85:8E?22?5:C63ED ?2B
366B;256?82?62?42B2?86=32?86E5:2?A2?DE=2?86=32?8 D6BC63ED 22? 5:D6B:2 =69 6?82? 6?86D29E: 646A2D2?
86=32?8H2?85:EEB52?G2DED6AE986=32?8D6BC63ED652=22? =2ED52A2D5:D6?DE2?56?82?6?88E?22?A6BC222?36B:ED
N 2DBC6D6?8295:56A2?A25234096?H2D22?C6D6?829
G2DED6AE952B:C?2B6D6A2DA62?DE=2? B6E6?C:H2?85:8E?22?=69C?2B36B252A252526B29E=DB2C?:
H2:DE5:2D2C
96BDIB6E6?C:D6BC63EDD:5252A2D5:56?82B52? A2?;2?886=32?8A252526B29E=DB2C?:C2?82D64:=C69:?8825:7B2C:
H2?8D6B;25:;E82C62:?64:=52?86=32?8D:5222?6?H632B 64:=?H2 A2?;2?8 86=32?8 H2?8 5:8E?22? 52A2D ;E82 5:8E?22?
E?DE 6?56D6C: 36?5236?52 H2?8 64:= 6?88E?22? 86=32?8 E=DB2C?:D6B52A2D;E82A2522=2D ,=2DD6BC63ED
EE?H25:8E?22?E?DE6?82?2=:C:C692:=2?2D2E6?56D6C: B82?B82?52=2DE3E9
Gambar 3.6
Teknologi 3D USG terbaru sekarang dapat melihat organ-organ tubuh
bayi dalam kandungan.
Sumber: www.mediajakartaselatan.com
Gambar 3.5
Sonar dapat digunakan untuk mendeteksi kedalaman laut.
pemancar penerima
gelombang ultrasonik
Contoh
3.3
63E292=2DC?2B5:8E?22?E?DE6?8EEB652=22?=2ED6=2?8G2DEH2?8 5:42D2D=69C?2BE?DE86=32?8A6B232D2?C2A2:632=:=28:6C?2B252=29
C6?:246A2DB232D86=32?85:52=22:B=2ED252=29
CD6?DE2?=29 652=22?=2EDD6BC63ED
7
:6D29E:
CC CQ
QC
6D6B 25:=2EDD6BC63ED6:=::652=22?
6D6B
Kata Kunci
• tinggi nada • kuat bunyi
• audiosonik • infrasonik
• ultrasonik • resonansi
• sonar • ultrasonografi
1
2 3
4
5
DIUNDUH DARI: WWW.BUKUPAKET.COM Sumber buku bse.kemdikbud.go.id
Gelombang Bunyi
55
Tes Kompetensi Subbab
C
3,-0..6-6.5+0 ?526?56?82B92=:=:?D2BC6?C6D6=29:=2D
D6B=:92D:246A2DB232D3E?H:5:E52B2
C D6?DE2?;2B22C2=:=2DD6BC63ED52B:D6A2D?52
63E29 2=2D C?2B 5:8E?22? E?DE 6?8EEB 652=22?=2ED6=2?8G2DEH2?85:42D2D=69C?2B
E?DE86=32?86B232DC2A2:632=:6C?2B 252=29C6?:2652=22?=2ED
D6?DE2?
46A2DB232D3E?H:5:52=22:B=2ED 6?82A26=6=2G2BH2?8D6B32?8A2522=292B:D:52
A6B?296?23B236?5236?52H2?82525:562D?H2 :2D:?88:?2525:?2:2?3282:2?229A6BE3292?
H2?8D6B;25:A252 2 7B6E6?C:
3 A2?;2?886=32?8 4 46A2DB232D86=32?8
5 2A=:DE586=32?8 :2E2D3E?H:5:?2:2?3282:2?229A6BE3292?
H2?8D6B;25:A252 2 7B6E6?C:
3 A2?;2?886=32?8 4 46A2DB232D86=32?8
5 2A=:DE586=32?8
D. Sifat-Sifat Gelombang Bunyi
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