Determination of sound velocity changes in relation with spring tide and neap tide in Lumut, perak / Muhammad Faiz Aqil Kamaruddin

Determination of actual water depth often having an error. Sound velocity is important in
hydrography survey in order to determine the depth of water. This study is aimed to identify the
changes of sound velocity between Spring Tide and Neap Tide on High Tide and Low Tide. The
objectives of this research is to analyze the salinity, temperature and pressure during Spring Tide,
during Neap Tide and between Spring Tide and Neap Tide on High Tide and Low Tide. In this
study, the sound velocity are collected on High Tide and Low Tide during Spring Tide and Neap
Tide on October 2017 in Lumut, Perak. The range of the average for sound velocity observed
between Spring Tide and Neap Tide on High Tide are from 1542.377 meter per second (m/s) to
1543.139 meter per second (m/s). The changes between tltem is at tire range from 0.008 meter per
second (m/s) to 0.779 meter per second (m/s). Next is on Low Tide, the range of sound velocity
are from 1543.423 meter per second (m/s) to 1545.332 meter per second (m/s). The difference
between them is from 0.765 meter per second (m/s) to 3.406 meter per second (m/s). By doing tins
comparison, it can be conclude that the changes of the sound velocity are affected by the changes
of the salinity, temperature and pressure during Spring and Neap Tide in Lumut, Perak on High
Tide and Low Tide.