Can one be yotzei by listening to another person say Kriyas Shema?

A person who listens to another person saying a brocha with intent to be yotzei fulfills his own obligation. This concept is known as shomeya k’oneh (listening is the equivalent of speaking). The poskim disagree about whether this rule can be applied to Kriyas Shema as well. Some say that since the Torah says v’dibarta bam, a person must articulate the words in order to be yotzei. Another possible reason for this view is that a person must accept the yoke of Heaven himself and cannot be yotzei through others. Under pressing circumstances, a person can rely on the majority opinion, which is lenient.

סימן סא, ס"ק מ; ביאורים ומוספים דרשו, 29 ;וראה שם, 30

The importance of reading Loshon Kodesh correctly

When a person reads Loshon Kodesh--when learning Tanach, reciting Pesukei D’zimrah or davening--he must be exact in his pronunciation. Care should be taken to stress each word, so that the end of one word is not combined with the beginning of the next. Chazal added an extra obligation to pronounce Kriyas Shema precisely, since the reader is being mekabel ol malchus Shomayim.

סימן סא, סעיף כא-כג וס"ק לד-לה

Why do some people kiss their hands after touching their tefillin?

When reading the words u’kshartem l’ois, a person should touch his tefillin shel yad. Similarly, when saying v’hoyu l’totafos, one should touch his shel rosh. Some people have a custom to kiss their hand after touching the tefillin, since kedusha from the tefillin “transfers” onto the hand. Others have a custom to touch the tefillin with their tallis or retzuos and kiss it afterwards.

סימן סא, סעיף כה וס"ק לט; ביאורים ומוספים דרשו, 28

• There are various times in which Boruch Shem is incorporated into tefilah. The poskim disagree about whether it must be said quietly at those times. 

• Boruch Shem is similar to the first pasuk of Shema in that it is also a part of kabalas ol malchus Shomayim. Therefore, if one did not have kavanah when saying Boruch Shem, he must say it again with kavanah.

• One should not say the word Amen twice when responding to a brocha. It gives the impression that there could be two powers (chas v’sholom). If one hears two brochos completed at the same time, one Amen suffices for both. 

• May Shema be said in English?

• Does one need to raise his voice if he is saying Shema in a noisy room?

• Is a person yotzei if he writes the words of Kriyas Shema?