acaustic properties sounddiameter batang. terjadi interaksi antara urin sapi dan limbah cair...
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Diameter Batang. Terjadi interaksi antara urin sapidan limbah cair industri tahu dalam mempengaruhidiameter batang. Diameter batang dengan rata-ratatertinggi dihasilkan pada perlakuan urin sapi 40 ml/kgtanah yang diaplikasikan dengan limbah cair industri tahu80 ml/kg tanah tetapi tidak berbeda nyata denganperlakuan urin sapi 120 ml/kg tanah yang diaplikasikandengan limbah cair industri tahu 0ml/kg tanah (Tabel 5).Panjang Akar. Hasil penelitian menunjukkan bahwatidak terjadi interaksi antara urin sapi dan limbah cairindustri tahu dalam mempengaruhi panjang akar tanamankakao. Dari hasil uji BNT, pemberian perlakuan urinsapi dosis 0 ml/kg tanah Diameter Batang. Terjadi interaksi antara urin sapidan limbah cair industri tahu dalam mempengaruhidiameter batang. Diameter batang dengan rata-ratatertinggi dihasilkan pada perlakuan urin sapi 40 ml/kgtanah yang diaplikasikan dengan limbah cair industri tahu80 ml/kg tanah tetapi tidak berbeda nyata denganperlakuan urin sapi 120 ml/kg tanah yang diaplikasikandengan limbah cair industri tahu 0ml/kg tanah (Tabel 5).Panjang Akar. Hasil penelitian menunjukkan bahwatidak terjadi interaksi antara urin sapi dan limbah cairindustri tahu dalam mempengaruhi panjang akar tanamankakao. Dari hasil uji BNT, pemberian perlakuan urinsapi dosis 0 ml/kg tanah menghasilkan panjang akarsebesar 27,21 cm tidak berbeda nyata dengan urin sapimenghasilkan panjang akarsebesar 27,21 cm tidak berbeda nyata dengan urin sapiTRANSCRIPT
Sound
In physics, sound is a vibration that propagates as a typically
audible mechanical wave of pressure and displacement, through a medium such
as air or water. In physiology and psychology, sound is the reception of such
waves and their perception by the brain.
Acoustics
Acoustics is the interdisciplinary science that deals with the study of all
mechanical in gases, liquids, and solids including topics such as
vibration, sound, ultrasound and infrasound. A scientist who works in the field of
acoustics is an acoustician while someone working in the field of acoustics
technology may be called an acoustical engineer. The application of acoustics is
present in almost all aspects of modern society with the most obvious being the
audio and noise control industries.
Hearing is one of the most crucial means of survival in the animal world,
and speech is one of the most distinctive characteristics of human development
and culture. Accordingly, the science of acoustics spreads across many facets of
human society—music, medicine, architecture, industrial production, warfare and
more. Likewise, animal species such as songbirds and frogs use sound and hearing
as a key element of mating rituals or marking territories. Art, craft, science and
technology have provoked one another to advance the whole, as in many other
fields of knowledge. Robert Bruce Lindsay's 'Wheel of Acoustics' is a well
accepted overview of the various fields in acoustics.
The word "acoustic" is derived from the Greek word ἀκουστικός (akoustikos),
meaning "of or for hearing, ready to hear" and that from ἀκουστός (akoustos),
"heard, audible",[3] which in turn derives from the verb ἀκούω (akouo), "I hear".[4]
The Latin synonym is "sonic", after which the term Sonics used to be a synonym
for acoustics and later a branch of acoustics. Frequencies above and below
the audible range are called "ultrasonic" and "infrasonic", respectively.
Sound Wave Properties and Characteristics
Sinusoidal waves of various frequencies; the bottom waves have higher
frequencies than those above. The horizontal axis represents time.
Sound waves are often simplified to a description in terms of sinusoidal plane,
which are characterized by these generic properties:
Frequency, or its inverse, the period
Wavelength
Wave number
Amplitude
Sound pressure
Sound intensity
Speed of sound
Direction
Sound that is perceptible by humans has frequencies from about 20 Hz to
20,000 Hz. In air at standard temperature and pressure, the corresponding
wavelengths of sound waves range from 17 m to 17 mm. Sometimes speed and
directions are combined as a velocity vector; wave number and direction are
combined as a wave vector. Transverse waves, also known as shear waves, have
the additional property, polarization, and are not a characteristic of sound waves.