what is the minimum distance required to produce a distinct echo?
274196
Question: What is the minimum distance required to hear an echo? Answer: The velocity of sound in dry air is approximately 343 m/s at a temperature of 25 °C. Therefore, the reflecting object must be more than 17.2m from the sound source for echo to be perceived by a person located at the source.
147505
The Echo Spot has a rounded body and 2.5-inch circular screen, making it ideal as a clock face for a bedside table. The Echo Show 5, on the other hand, features a rectangular 5.5-inch screen with a curved back, offering a more traditionally-shaped display.
1230571
['an appropriate reverberation time.', 'uniform sound distribution.', 'an appropriate sound level.', 'an appropriately low background noise.', 'no echo or flutter echo.']
701468
It works by sending out a burst of ultrasound and listening for the echo when it bounces off of an object. It pings the obstacles with ultrasound. The Arduino or Genuino board sends a short pulse to trigger the detection, then listens for a pulse on the same pin using the pulseIn() function.
1376343
Echoes. An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. ... That is why echoes can be heard in a canyon, cave, or mountain range.
733724
The 3:1 distance rule is a general rule of thumb for close miking. To prevent phase anomalies and leakage, the microphones should be placed at least three times as far from each other as the distance between the instrument and the microphone.
374428
This is the single biggest difference between the two devices, as the third generation sounds significantly better than the second generation. The new 3rd-gen Echo Dot has a single 1.6-inch speaker sending out 360-degree sound. ... You can also connect it wirelessly to an external speaker via Bluetooth.
939514
Today, echo sounders are used to make bathymetric measurements. An echo sounder sends out a sound pulse from a ship's hull, or bottom, to the ocean floor. The sound wave bounces back to the ship. The time it takes for the pulse to leave and return to the ship determines the topography of the seafloor.
785213
['1 microliter 100 mM dATP.', '1 microliter 100 mM dGTP.', '1 microliter 100 mM dCTP.', '1 microliter 100 mM dTTP.', '36 microliter H2O.', 'Because, now you have 400 mM dissolved in 40 microliter total volume, 400 mM/40 = 10 mM dNTP mix.']
131834
How does the echolocation work? Oilbirds emit short bursts of clicking noises, which bounce off of objects in the animals' paths, creating echoes. The echoes return to the birds' ears at different levels of loudness and intensity. The larger the object, the more sound waves that are deflected, making the echoes louder.
933243
The Home provides richer, more well-rounded sound than the Echo does, although it doesn't get as loud—there's a 3-4dB difference in maximum volume at a one-foot distance. The Home delivers much better sound quality than the tiny Amazon Amazon Echo Dot. Both devices support iHeartRadio, Pandora, Spotify, and TuneIn.
622485
['Frequency, or its inverse, wavelength.', 'Amplitude, sound pressure or Intensity.', 'Speed of sound.', 'Direction.']
956533
Most bat echolocation occurs beyond the range of human hearing. Humans can hear from 20 Hz to 15-20 kHz depending on age. Bat calls can range from 9 kHz to to 200 kHz. Some bat sounds humans can hear.
588504
Delay is one or more distinct sound images. ... Stand in a huge room and yell "hello." The very first sound you hear reflected off the walls is an echo. That echo quickly turns into reverb as the sound is reflected off a second, third, and fourth surface. Think of delay as a single copy of the sound at a later time.
301783
The Echo has a 0.6-inch tweeter, while the Echo Plus' tweeter is 0.8 inches. Compared to other Bluetooth and WiFi speakers on the market, that's nothing to write home about, but it provides a decent level of bass and resonance for listening to music and radio. The Echo Dot has even less in terms of audio power.
1295436
By doing so, we can confidently say that on average, the cost of an echocardiogram in the United States is approximately $1,500. But the cost of a 2D echo could really fall anywhere between $1,000 and $3,000.
1128365
What dB should vocals be recorded at? You should record vocals at an average of -18dB for 24-bit resolution. The loudest parts of the recording should peak at -10dB and be lowest at -24dB. This is to keep an even balance on the level of the vocals without distortion.