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How much louder is 50db then 30db?
The sound of 50 decibles will have 105 and 30 db will have only 103 w/m2 sec.It is clear that first one has greater intensity The sound of 50 decibles will have 105 and 30 db will have only 103 w/m2 sec.It is clear that first one has greater intensity The sound of 50 decibles will have 105 and 30 db will have only 103 w/m2 sec.It is clear that first one has greater intensity
How many times louder is a sound wave with an intensity of 50dB than a sound wave with an intensity of 20dB?
Better think of the sound pressure, when you are listening. Sound pressure moves your ears and the diaphragm of the microphones. The sound intensity is very small. The level of 50 dB is equal to 0.0000001 W/m2 acoustic intensity. Scroll down to related links and look at "Conversion of sound units (levels)".
A sound of 20 dB intensity is twice as loud as one of 10dB?
No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.
Louder at 800 Hz 50dB or 600 Hz 30dB?
Sound Pressure Level(dB SPL) response , based on Equal- Loudness contours( ISO 226:2003 rev) and the Original ISO Std( set for 40 phons), applied in correlation to Fletcher Edmund - for Psychoacoustics, show that 30 dB @ 600Hz in quieter than 50dB @ 800Hz. ( 3rd Octave diagram range 10Hz to 20 KHz.) . FFT /sound density and 3rd Octave are in line for this particular case.
How much louder is 50db then 30db?
The sound of 50 decibles will have 105 and 30 db will have only 103 w/m2 sec.It is clear that first one has greater intensity The sound of 50 decibles will have 105 and 30 db will have only 103 w/m2 sec.It is clear that first one has greater intensity The sound of 50 decibles will have 105 and 30 db will have only 103 w/m2 sec.It is clear that first one has greater intensity
Do you have to have 100 percent hearing to be a pilot?
You don't need 100% hearing. You must be able to clearly hear with both ears and your back turned towards the source, a regular conversational voice in a quiet room from a distance of 6ft.If your medical examiner decides to perform an audiometric speech discrimination test you must pass with scores better than:Your better ear at sound levels 500Hz, 1000Hz, 2000Hz, 3000Hz with 35dB, 30dB, 30dB, 40dB respectively.Your worst ear at sounds levels 500Hz, 1000Hz, 2000Hz, 3000Hz with 35dB, 50dB, 50dB, 60dB respectively.
What does 50db sound like?
Quiet street Normal conversation refrigerator 50 - 60 electric toothbrush 50 - 75 washing machine 50 - 75 air conditioner 50 - 80 electric shaver 40-45-hotel, theater between performances 50-65-loud conversation 40 quiet office, library 50 large office
How many times louder is a sound wave with an intensity of 50dB than a sound wave with an intensity of 20dB?
Better think of the sound pressure, when you are listening. Sound pressure moves your ears and the diaphragm of the microphones. The sound intensity is very small. The level of 50 dB is equal to 0.0000001 W/m2 acoustic intensity. Scroll down to related links and look at "Conversion of sound units (levels)".
What is the noise ordinance for the city of Rancho Palos Verdes CA?
Per the City of Torrance website and commission meetings notes, it's 10:00PM to 7:00AM at a decibel level of 50db or above. Added - It depends on where you live int he city of Torrance. Section 3 and Section 4 are the primary residential zones. Section 3 (down by South Torrance High) during daytime 7am - 10am is 50 dba and at night is 45dba 10pm - 7am. Section 4 (the majority of Torrance residential zones) is 55dba during the day and 50 db at night. If you are in fear of legal trouble or issues it is a wise idea to take sound measurements with a sound meter that measures dba. dbc dbd and dbz are useless in property disputes. It is recommended to check out how loud you are and document yourself or even better, pay a sound engineer to do it for you so you have 3rd party documentation. b^^
What Does SPL stand for and how is it measured?
SPL stands for Sound Pressure Level. It basically relates to how much acoustic energy is in sound that you hear. SPL is measured in decibels, or dB. The base reference for SPL is 0dB_SPL, which corresponds to a pressure of 0.0002 dynes per square centimeter, or about the quietest sound a young, undamaged ear can hear, between 1khz and 4khz. SPL of typical situations are: * quiet home at night = 50dB * average conversation = 65dB * heavy street traffic 5 feet away = 90dB * loud rock music at concert = 112dB (or more) * threshold of pain = 130dB * rifle fired 3 feet away = 140dB Some SPL trivia: * An increase of 3db in loudness is just barely perceived as a change, 10dB seems about twice a loud as before to human ears. * If you are playing sound (music, etc.) through an amplifier, and you double the output power by turning up the volume (say, from 20 watts to 40 delivered to the speaker), the SPL will go up about 6dB. * There are several different weighting schemes, the two most popular being A and C weighting, that (supposedly) modify the SPL curve to more closely fit the way our ears hear. "A" weighting is commonly used to measure noise, and test for sound that may damage ears. "C" weighting is commonly used to measure sound levels such as audio sound system output, listening rooms, concerts, and the like. * Pure SPL by itself does not really tell us how loud we will perceive a sound, since the human ear reacts differently to different frequencies, thus the reason for weighting curves. SPL is measured with, yup, an SPL meter. SPL, or 'Sound Level' meters, use a calibrated microphone and amplification to measure and display SPL on an analog meter or digital display.
A receiver requires 10nW as input power if all the system losses add up to 50dB then how much power is required from the source?
here, the power required by the receiver is the output power and that required from the source is input power. Gain in dB=10 log(output power/input power) we have, loss in dB = -gain in dB = 10 log(input power/output power) or, 50 = 10 log(input power/10nW) or, anti-log(5) = input power/10 nW so the power required from the source is antilog(5)*10nW = 1 mW
A sound of 20 dB intensity is twice as loud as one of 10dB?
No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.
A ground station parabolic antenna has an efficiency of 0.6 and a gain of 50dB at a frequency of 6 GHz Calculate the diameter of the antenna?
For 'f' in GHz and 'D' in feet, I always use Gant, dB = 20 log( f x D ) + 7.5But I think that's for 55% efficiency. If the eff is 60%, that's 20log(60/55) better = another 0.75 dB. So let's make itGant, dB = 20 log( f x D ) + 8.2520 log( 6 D ) + 8.25 = 5020 log( 6 D ) = 41.75log ( 6 D ) = 2.08756 D = 102.0875D = 102.0875 / 6 = 20.39 ft = 6.21 meters (rounded, but it looks reasonable; hope it's close)
Hearing Impaired Telephones?
Telephones for the hearing impaired have become technically advanced in the last few years and have several features that make them very useful. Often people don't realize they need a special phone and it is someone else who buys it. It is important for the person who is hearing impaired to be involved in choosing the type of phone that is comfortable and suits their need the best. Being hearing impaired can make a person feel isolated, especially if they live alone. They avoid telephone calls because it is so frustrating to be unable to hear clearly pr have a good conversation. They may not even call when they need assistance because they would rather handle any problem themselves than deal with the telephone. The amplification level of the phone is important. There are phones that are amplified from 15db to 50db. The amplification should be correct for the kind of hearing loss. A hearing aid may help a person while talking directly to people but may not be enough for talking on the telephone. Some extra amplification may be needed. If a person wears a hearing aid they may get feedback from a hearing impaired telephone, so the ear piece needs to be compatible with a hearing aid. Tone adjustment is another consideration, because some people cannot hear high or low pitch sounds. They need to be able to adjust the frequency to one that they can hear. Hearing impaired telephones cost from $50 to $250 depending on the features added and the amount of amplification. Some phones may have extra features that you don't need. Digital enhanced Cordless Telecommunication (DECT 6.0) is the latest technology for hearing impaired telephones. It uses less power than other types of phones, is not affected by interference, has a wide cordless range and gives secure communication. There are some makes and models that expand up to 12 handsets, so there can be one in every room. Plantronics, Inc. is a company that has devoted time and money to researching sound enhancing devices for the hearing impaired. They have been innovating for years and their Clarity phones division offers an amplified telephone with patented Digital Clarity Power. This amplifies conversations on the phone without any distortion or static and allows the user to adjust the level of amplification and sound characteristics in the phone. They have a phone for any level of hearing impairment from slight to severe including high and low frequencies.
