Appraisal Meaning in Hindi. There are total 2 hindi meaning and definitions have been listed for the english word 'appraisal'. Its first meaning is 'à¤à¤à¥à¤¨à¤¿-à¤ªà¤°à¥à¤à¥à¤·à¤¾' which can be transliterated into english as 'agni-pariksha'.
Confidence votes 7. The highness or lowness of a sound is determined by its frequency, measured in Hertz. (Hz) The lower a sound is, the more distance it can travel. A low sound is felt as well as heard. (Hence, the term Feel the Bass.) The higher a sound is, the less distance it can travel.
Our perception of sound is directly related to the physical properties of sound waves (see Figure 3.7). One of the ï¬ rst things that we notice about a sound is how loud it is. Loudness is determined by the intensity, or amplitude, of a sound wave and is measured in units called decibels. Zero decibels represents the loudness of the softest sound that humans can hear, or the absolute threshold for hearing. As decibels increase, per-ceived loudness increases. Pitch refers to the relative âhighnessâ or âlownessâ of a sound. Pitch is determined by the frequency of a sound wave. Frequency refers to the rate of vibration, or number of waves per second, and is measured in units called hertz. Hertz simply refers to the num- ber of wave peaks per second.