31.   Personal communications services, or PCS, use different frequencies than cellular services.

32.   Police and fire departments often use different frequencies on their radios.

33.   Plus, if you get more than one, they have different frequencies, so we can have races around her living room and get her pacemaker going.

34.   Some broadcasters also transmit at several different frequencies to improve reception in different parts of the world.

35.   Some, like the common brown bat common, use pulses of different frequencies.

36.   That equipment could be moved to a different frequency.

37.   The aids that allow patients to change the amplification of different frequencies based on their hearing needs of the moment offer the best shots at normal hearing.

38.   The beeper can be adjusted to transmit over two different frequencies, one used primarily by civilian pilots, the other by military pilots.

39.   The computers share the same wires as the phones but operate at a different frequency that does not interfere with voice traffic.

40.   The phones operate on a different frequency than cellular phones.