Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general

Child Classifications

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• G10K 11/002 CPC only CPC only
• G10K 11/004 +1 CPC CPC only CPC only
• G10K 11/02 Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators +1 CPC IPC+CPC Available in IPC and CPC
• G10K 11/08 Non-electric sound-amplifying devices, e.g. non-electric megaphones (amplifying by horns G10K11/02; amplifying by focusing G10K11/26) IPC+CPC Available in IPC and CPC
• G10K 11/16 Methods or devices for protecting against, or for damping, noise or other acoustic waves in general (G10K11/36 takes precedence) since 1980 +1 CPC IPC+CPC Available in IPC and CPC
• G10K 11/18 Methods or devices for transmitting, conducting or directing sound (G10K11/02, G10K11/36 take precedence) since 1980 IPC+CPC Available in IPC and CPC
• G10K 11/36 Devices for manipulating acoustic surface waves (electro-acoustic amplifiers H03F13/00; networks comprising electro-acoustic elements H03H9/00) since 1980 IPC+CPC Available in IPC and CPC