发明名称 |
PROCESS AND DEVICE FOR SCARING AWAY BIRDS |
摘要 |
In order to scare away birds, at least two acoustic signals are produced, the frequency of which is periodically modulated within a range of about 30 to 9000 Hz; the modulation period is about 0.01 to 5 seconds. The signals are different from one another in respect of their frequency modulation range, in modulation period and/or time duration. The signals are emitted in a fixed or arbitrary sequence. |
申请公布号 |
WO8604485(A1) |
申请公布日期 |
1986.08.14 |
申请号 |
WO1986EP00009 |
申请日期 |
1986.01.11 |
申请人 |
BATTELLE-INSTITUT E.V. |
发明人 |
BEUTER, KARL;WEISS, RAINER |
分类号 |
A01M29/16;G10K15/02;(IPC1-7):A01M29/02;B06B1/02 |
主分类号 |
A01M29/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|