Some sounds not only harm your hearing,but also can make it hard to pay attention while reading or doing homework and prevent you from falling asleep.It is important that you learn about sound and how to identify(辨认) when it is harmful to you. Sound is measured in units called decibels...
Sound is measured in units called decibels (分贝). At a level of 140 decibels people feel pain in their ears. Trucks, buses, motorcycles, airplanes, boats, and factories all make noise. This noise bothers not only our ears, but our minds and bodies as well. ...
Sound is measured in units called decibels. Deaf people hear either faint sounds or no sounds ... J Walker - 《First Fun Encyclopedia》 被引量: 6发表: 2003年 Outer ear canal sound pressure and bone vibration measurement in SSD and CHL patients using a transcutaneous bone conduction instrument...
increases. Loudness is measured in units calleddecibels. The sound waves given off by different vibrating bodies differ in quality, or timbre. A note from a saxophone, for instance, differs from a note of the same pitch and intensity produced by a violin or a xylophone; similarly vibrating ...
The loudness, or intensity, of sound is measured in decibels. For each increase of 10 decibels, the sound wave has 10 times as much energy. For example, a sound of 20 decibels is twice as loud as one of 10 decibels, but has 10 times the energy. The softest sound humans can hear, ...
The amplitude of a sound is a measure of the average variation in pressure, measured in pascals (Pa). Since the mean amplitude of a sound is zero, we need to measure amplitude either as the distance between the most negative peak and the most positive peak or in terms of the root-mean...
The resulting mean space average sound pressure levels in the source and receiver rooms are measured and the difference in levels, called the noise reduction, NR, is determined. The random incidence transmission loss can be obtained by: (6.23)TL=NR+10log10ASα¯ where A is the panel area...
Learn all about sound and noise, types of microphone transducers, and measurement devices used to measure sound level, pressure, power, and intensity.
The amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does the amplitude of a sound wave increase if the sound intensity level goes up by 40.0 dB? If a sound intensity level of 0 dB at 1000 Hz corresponds to a maximum gauge pressure (sound ...
The units are measured in “Pa/V” or pressure per unit voltage. This function is created by playing broadband noise through the speaker and measuring the response with a microphone placed at the regulatory positions shown in Figure 19. In addition to measuring the pressure response at the micr...