BREAKING DOWN 'Tight Monetary Policy'. The Fed can sell Treasuries on the open market in order to absorb some extra capital during a tight monetary policy. This effectively takes capital out of the open markets as the Fed takes in funds from the sale with the promise of paying the amount back with interest. The Fed will often look at tightening monetary policy during times of strong economic growth.
The erroneous assumption made by this committee was that effects of low frequency sound can only be mediated through hearing, so that if infrasounds could not be heard then they could not possibly affect human physiology. Such an assumption is absurd and does not apply to other sensory systems of the body.t is also known that OHC provide mechanical amplification of the high frequency sounds that you normally hear. The presence of low frequency sound can alter the amplification of high frequency sounds which causes amplitude modulation and harmonic distortion of the high frequency sounds.
How is pitch or frequency determined? Range of hearing: 20-20,000 Hz. Range in volume 10 6! Sound processing is very complex and involves positive feedback. Feedback enhances sensitivity, but can go above one and ear starts vibrating by itself. The ear actually produces a tone â this is the ringing in your ear. 1  Basilar membrane resonates when a sounds wave enters: Different parts resonate at different frequencies. 2  Resonant frequencies are spaced logarithmically â like a piano. 3  A single input frequency can activate a range of nerves on the Basilar membrane: