Gravity tubes are the resources where you can identify different sounds from. There are many different sounds you can make using the gravity tubes. Gravity tubes are long sticks that you can make sound come out of when you move it a certain way. We Can Test out different gravity tubes, to see the different kind of sound waves it makes investigate and analyze characteristics of waves, including velocity, frequency, amplitude, and wavelength ;we can compare characteristics and behaviors of transverse waves, including electromagnetic waves and the electromagnetic spectrum, and characteristics and behaviors of longitudinal waves, including sound waves; investigate behaviors of waves, including reflection, refraction, diffraction, interference, resonance, and the Doppler effect.
Design and implement investigative procedures, including making observations, asking well-defined questions, formulating testable hypotheses, identifying variables, selecting appropriate equipment and technology, and evaluating numerical answers for reasonableness; demonstrate the use of course apparatus, equipment, techniques, and procedures, including data acquisition probes, ring clamps, ring stands, tuning forks, graphing technology, computers.
Specific gravity, as it is a ratio of densities, is a dimensionless quantity. Specific gravity varies with temperature and pressure; reference and sample must be compared at the same temperature and pressure, or corrected to a standard reference temperature and pressure. Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water. The term "relative density" is often preferred in modern scientific usage.
Electromagnetic energy from the sun is essential for life on earth. Plants rely on inputs of EM energy for photosynthesis and for regulation of periodic functions. Many experiments have been conducted investigating possible effects of RF exposure on plants and animals. Generally, exposures to particular single frequencies at particular, usually fairly high intensities, have been used in these previous experiments. Frequency-lowering strategies, which present high-frequency sounds to lower-frequency regions, have been used in audio recording and entertainment for a long time, changing the key of a karaoke song to suit the vocal range of the singer and explored in hearing aids since the 1960s. Now, two new studies investigate the limits of the approach, particularly for those with lower cognitive function
The rationale for frequency lowering is that many hearing aids cannot make sounds audible to their users because of the high-frequency roll-off of receivers, and individuals with high-frequency hearing loss or cochlear dead regions may not be able to make use of high-frequency sounds even if the sounds are audible.Frequency compression is analogous to amplitude compression, whereby sounds with a large range of amplitude variations are packed into a smaller amplitude range. The frequency compression threshold is analogous to the knee point or compression threshold in the amplitude compression algorithm, in that frequencies above the threshold are compressed in both cases.
In addition, the sound quality degradation in quiet was more prominent for listeners with better high-frequency hearing. Frequency compression can be a viable intervention for listeners with more severe high-frequency hearing loss, but not for all hearing aid users, the authors suggested. They also warned of a possible trade-off between improved audibility and increased distortion when fitting frequency compression hearing aids.