band pass filter

band-pass filter

[band-pas, -pahs]
noun Electricity, Electronics.
a filter that attenuates all frequencies except those of a specific band, which it amplifies.

1920–25 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
band-pass filter
1.  electronics high-pass filter Compare low-pass filter a filter that transmits only those currents having a frequency lying within specified limits
2.  an optical device, consisting of absorbing filters, for transmitting electromagnetic waves of predetermined wavelengths

Collins English Dictionary - Complete & Unabridged 10th Edition
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