DE308933C - - Google Patents

Info

Publication number

DE308933C

DE308933C DENDAT308933D DE308933DA DE308933C DE 308933 C DE308933 C DE 308933C DE NDAT308933 D DENDAT308933 D DE NDAT308933D DE 308933D A DE308933D A DE 308933DA DE 308933 C DE308933 C DE 308933C

Authority

DE

Germany

Prior art keywords

membrane

microphone

sound

listening

intermediate layer

Prior art date

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Active

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• 239000012528 membrane Substances 0.000 claims description 18
• 239000010445 mica Substances 0.000 claims description 2
• 229910052618 mica group Inorganic materials 0.000 claims description 2
• 239000006096 absorbing agent Substances 0.000 claims 1
• 229910000831 Steel Inorganic materials 0.000 description 6
• 239000010959 steel Substances 0.000 description 6
• 239000011324 bead Substances 0.000 description 3
• 229920001875 Ebonite Polymers 0.000 description 2
• 230000005540 biological transmission Effects 0.000 description 2
• 230000010355 oscillation Effects 0.000 description 2
• 239000000843 powder Substances 0.000 description 2
• 229910001369 Brass Inorganic materials 0.000 description 1
• OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
• 239000010951 brass Substances 0.000 description 1
• 238000010276 construction Methods 0.000 description 1
• 230000035945 sensitivity Effects 0.000 description 1