The only bird known to make use of infrasound (at about 20 Hz) is the western capercaillie. The hearing range of birds is from below 50 Hz (infrasound) to around 12 kHz, with maximum sensitivity between 1 and 5 kHz. The range of frequencies at which birds call in an environment varies with the quality of habitat and the ambient sounds.
Get started now! 1  Commercial carpet cleaning costs between $.05 and $.20 per square foot. 2  You can rent Rug Doctor carpet cleaning machines for $25 to $40 for 24 hours from many locations. 3  You can buy carpet steam cleaners starting at around $150.
The average home has about 1000 square feet of carpet. At $0.15 per foot, this amounts to $150.00 for about two and a half hours work (80 minutes cleaning-40 minutes set up/break down-30 minutes transportation time) If there is less than 500 sq. ft. of carpet, I would charge a minimum $75 fee just to unwind my hoses.dd in the original cost of the carpet $2500 (the carpet will last 13 years with yearly cleaning) and let's see...$3550 for carpet purchase and yearly cleaning over 7 years vs. $5300 for one carpet cleaning and carpet replacement.